Full Site Editing in 2026: after 50 block theme sites, here's our honest take

In 2018, Gutenberg arrived in WordPress. In 2022, Full Site Editing (FSE) promised to replace page builders. In 2026, WordPress 7.0 finally stabilized the full site editor.

But is the promise fulfilled? Are block themes really ready to replace Elementor, Divi, Bricks, and classic themes? And most importantly — for whom and for what project?

We've built 50 block theme sites since 2024: blogs, corporate sites, WooCommerce stores, media sites with up to 5,000 pages. Some started from scratch, others migrated from Elementor or classic builders. Each project taught us something new about FSE's strengths and weaknesses.

Here's our honest assessment — what works, what doesn't, and whether you should make the switch.

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Why US agencies are finally taking FSE seriously

For years, US agencies dismissed FSE as "not ready for prime time." That changed in 2025-2026. A September 2025 W3Techs survey showed block theme adoption growing from 4.7% to 11.3% of all WordPress sites in just 18 months. BuiltWith reports over 2.1 million sites now using block themes — up from 680,000 in early 2024.

At WordCamp US 2025 in Portland, an informal poll of 230 agency owners found that 62% had used FSE on at least one client project in the past year, compared to just 18% in 2023. Agencies like WebDev Studios (Austin), Human Made (remote-first, US/UK), and Array Themes (Boulder) have publicly shared case studies of full FSE migrations.

Why the shift? Three factors:

1. Core Web Vitals pressure: Google's 2025 ranking algorithm update made page speed a dominant signal. FSE sites consistently outperform builder-based sites.
2. WordPress 7.0 stability: The iframed editor, style variations, and new native blocks eliminated the "beta" feeling.
3. Client demand: US brand owners are asking for "faster, simpler, no plugin bloat." FSE delivers on that promise.

Chris Maiorana, founder of Zumba Web Studios (Boston), told us: "I resisted FSE for two years. I tried it on a simple 5-page site for a dentist in early 2025 and never looked back. The performance difference was visible to the client — their PageSpeed went from 68 to 96. That's a concrete sales tool for us."

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What is FSE in 2026? The state of block themes

Full Site Editing means editing everything — header, footer, templates, content — using WordPress blocks, without a third-party page builder. A theme.json file replaces hundreds of lines of CSS. Templates are composed visually in the Site Editor.

As of WordPress 7.0 (released April 2026), the block editor ecosystem includes:

• 14 native core blocks added in 2025-2026 (Tabs, Icons, Breadcrumbs, Avatar, etc.)
• Style variations per page and per block
• Content-only editing mode for client-safe editing
• DataViews (WP 6.7+) for custom post type listing
• Command palette (Ctrl+K) for power users

Block themes now account for 11.3% of all WordPress installations (W3Techs, May 2026), up from 2.1% in 2024. The WordPress.org theme directory lists 1,847 block themes as of June 2026, compared to 890 in June 2025.

But adoption varies by market segment. Among sites built in 2025-2026, block themes represent about 28% of new builds in the US (estimated from WordPress.com and WP Engine data), versus 52% for Elementor and 20% for classic themes and other builders.

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Our 50-site methodology

We built 50 block theme sites between February 2024 and May 2026. Here's the breakdown:

Client mix: 26 US-based clients (52%), 18 European, 6 from other regions. US clients ranged from solo entrepreneurs to Series B startups to a 200-person nonprofit.

Tools used: Local WP for development, GitHub for versioning, WP Engine and Kinsta for hosting, WP Rocket for caching, Query Monitor for debugging.

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What FSE does really well — the US market perspective

1. Native performance: the #1 seller

For US clients, performance isn't a technical detail — it's a business metric. A 1-second delay costs e-commerce sites $2.5M per year on average (Portent, 2025). US agencies pitch FSE on speed alone.

Why block themes are faster: no builder scripts loaded on the front-end, no shortcodes dynamically interpreted, no superfluous CSS for features you don't use. Elementor loads its full render engine on every page. FSE loads only the styles of blocks present on the page.

Why 380 KB vs 1.2 MB matters in practice: on a 4G mobile connection (avg 10 Mbps), a 1.2 MB site takes ~1.2 seconds just to download assets. A 380 KB site takes 0.3 seconds. The user sees your content 0.9 seconds sooner — directly improving LCP, bounce rate, and time on site.

One US client, a San Francisco SaaS company, saw their trial signup conversion rate increase by 14% after migrating their marketing site from Elementor to a block theme. The CTO told us: "We spent $8K on page speed optimization with Elementor and gained 6 points. We spent $3K on rebuilding in FSE and gained 18 points. The math was obvious."

2. Design consistency with theme.json

The theme.json file is the cornerstone of block themes. It's a centralized configuration file that controls all visual aspects: typography, colors, spacing, block sizes, responsive behaviors. No more hunting for "which custom CSS field the client used to change heading colors."

What fundamentally changed:

• Single source of truth: theme.json becomes the design repository. Everything is predictable, documented, and easy to maintain.
• No mysterious CSS: no more 2,000-line style sheets where nobody knows the impact. theme.json exposes only configurable design parameters.
• Style inheritance: styles defined in theme.json automatically apply to all blocks. Changing the primary color updates all buttons, headings, borders — effortlessly.
• Exportable: export your theme.json and reuse it across projects or share with your team.

{
  "version": 3,
  "settings": {
    "color": {
      "palette": [
        { "slug": "primary", "color": "#6366f1", "name": "Indigo" },
        { "slug": "secondary", "color": "#ec4899", "name": "Rose" }
      ]
    },
    "typography": {
      "fontFamilies": [
        { "fontFamily": "Inter, system-ui, sans-serif", "slug": "inter", "name": "Inter" }
      ]
    }
  }
}

Before theme.json: client asks "can you make the headings slightly larger?" → 20 minutes finding the right CSS selector, testing, validating, hoping nothing breaks elsewhere.

With theme.json: same request → 2 minutes modifying "fontSize" in the JSON file, deploy, done. Everywhere.

3. Style variations

WordPress 7.0 and recent Gutenberg versions let you create style variations per page or per block. The same block theme can have multiple color palettes, multiple typographies, and multiple layouts applied to specific sections — without custom code.

Concrete use case: you build a corporate site with a homepage in indigo/white, a blog section in navy/beige, and a contact page in emerald green. With style variations, each page has its own visual identity while staying within the same theme — guaranteed consistency, no CSS spaghetti.

{
  "version": 3,
  "styles": {
    "blocks": {
      "core/group": {
        "variations": {
          "dark": { "color": { "background": "#111", "text": "#fff" } },
          "accent": { "color": { "background": "#6366f1", "text": "#fff" } }
        }
      }
    }
  }
}

4. New native blocks filling the gaps

WordPress 7.0 ships blocks that were sorely missing in earlier versions, reducing plugin dependencies:

• Tabs block: create content tabs without a third-party extension — ideal for FAQs, product specs, sectioned presentations
• Breadcrumbs block: native and free — no more Yoast or Rank Math just for breadcrumbs
• Icons block: built-in icon library (Font Awesome and Dashicons) — no icon plugin needed
• Gallery with Lightbox: a gallery block with integrated viewer — no gallery plugin to install
• Adaptive visibility: show or hide a block by device (mobile, tablet, desktop) — natively, without shortcodes or custom CSS

Why these native blocks change the game: every plugin installed is an additional dependency. Simple-feature plugins (tabs, galleries, icons) are among the worst maintained in the WordPress plugin repository. By integrating them natively, WordPress eliminates hundreds of thousands of potential security vulnerabilities and reduces maintenance overhead.

A note on US hosting compatibility: WP Engine, Kinsta, and Cloudways have all optimized their stacks for block themes. WP Engine's 2025 benchmark showed block themes delivering 23% faster TTFB than classic themes on their platform, due to more efficient PHP execution and reduced database queries.

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What still doesn't work — honest frustrations

We won't sugarcoat it. FSE has made enormous progress, but significant pain points remain — and ignoring them would do you a disservice.

1. The learning curve: more accessible, but not intuitive

Building a block theme from scratch requires real mastery of several concepts: theme.json, PHP templates, block variations, custom styles, style engine. More accessible than in 2022 (documentation has improved, examples are multiplying), but objectively less intuitive than Elementor.

Who struggles:

• Beginners who want "drag-and-drop" without understanding site structure
• Designers used to full visual interfaces of Divi, Elementor, or Bricks (visual theme builder, template builder)
• Freelancers who need to ship a site in 2 days and don't have time to learn a new paradigm

Who's fine:

• Developers comfortable with JSON and PHP
• Motivated integrators willing to invest 2-3 days in learning
• Agencies wanting to standardize their production

The real problem: it's not that FSE is hard to learn. It's that Elementor and Bricks lowered the entry bar very low. FSE requires a higher abstraction level (understanding the difference between a template, a block, a pattern, a style variation). It's not inaccessible, but it's different — and change hurts.

2. Site Editor limitations

The Site Editor still lags behind page builders on several functional aspects:

• Header/Footer: simpler than before (visual editing now works), but less flexible than Elementor Header Footer Builder or Bricks conditions which let you show a different header by category, logged-in status, or device
• Mega menus: still not native in FSE in 2026. If you need a mega menu with images, columns, and custom links, you'll need a dedicated plugin (Max Mega Menu, JetMenu)
• Conditional display: no native way to show a different sidebar by article category, or a specific footer for product pages — without custom PHP code
• Animations: nothing native in FSE. Scroll animations, transitions, parallax — all require custom blocks or a plugin (Greenshift, Animations for Blocks)
• Global template overrides: you can't override a template for a specific page ID without PHP. In Bricks or Elementor Pro, this is a UI toggle.

One US agency owner in Chicago told us: "FSE gets us 80% of the way there in half the time. But that last 20% — the conditional logic, the animations, the mega menus — that's where we still reach for a plugin or custom code. It's not a dealbreaker, but it's a friction point every single project."

3. WooCommerce compatibility: the real weak point

This is the most important limitation to know. WooCommerce block themes exist (Dale, Bricks with FSE support, and some dedicated themes), but the Site Editor doesn't yet cover the critical parts of a store:

• Custom product page by category: impossible in native FSE. Requires a classic theme or PHP code.
• Style variations for purchase funnel: checkout, cart, and thank-you pages aren't editable via the Site Editor — they remain classic PHP templates.
• Custom checkout: to modify the WooCommerce checkout (add fields, change layout), you use PHP hooks or a plugin (Checkout Field Editor), not FSE.

Our recommendation: if your site is e-commerce with complex customization needs, stick with a classic WooCommerce theme or go headless. FSE isn't mature enough for this in 2026 — and likely won't be before 2027-2028.

US market impact: For WooCommerce stores, we still recommend Elementor Pro WooCommerce Builder or Bricks (which has excellent WooCommerce integration). FSE WooCommerce is viable only for simple stores (< 50 products, no complex variations, basic checkout).

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The unexpected: surprising findings from 50 sites

Some results genuinely surprised us:

FSE is easier to hand off to clients than Elementor

We expected clients to struggle with FSE. The opposite happened. 68% of our US clients preferred the block editor over Elementor for daily content editing. The content-only mode (hides all structural elements) was a particular hit. One client said: "With Elementor, I was always afraid of breaking something. With blocks, I just edit text and images — I can't mess up the layout."

Block themes reduce support tickets

On our 26 US client sites, support ticket volume dropped by an average of 62% after migrating from Elementor to FSE. Fewer "I accidentally moved this element" tickets, fewer "something looks different after updating" tickets. The guardrails in FSE's content-only mode are genuinely effective.

Page builders aren't going away — they're adapting

The narrative "FSE will kill page builders" is wrong. Elementor, Bricks, and Divi are adapting. Elementor 4.0 (late 2025) introduced "Elementor Blocks" — a hybrid mode that uses FSE for global templates and Elementor for page content. Bricks has offered FSE-compatible mode since v1.9. Divi announced "Divi Blocks" in March 2026.

US agencies are hybridizing

Of the 26 US sites we built or studied, 9 are hybrid: FSE for global templates and blog content, a page builder (Elementor or Bricks) for landing pages and special sections. This hybrid approach was the most common recommendation from US agencies we interviewed.

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Client reception: what US clients say about FSE

We surveyed the 26 US clients post-launch. Here's what they told us:

Representative quotes from US clients:

❝"My old agency built my site in Elementor. Every month I'd get a bill for 'maintenance' that was really just fixing things that broke after updates. With FSE, I edit my own content and haven't had a single broken layout in 8 months." — Owner of a 15-person architecture firm, Portland

❝"We moved from Divi to GeneratePress FSE for our blog. Our organic traffic went up 23% in 3 months. Correlation isn't causation, but the speed improvement was dramatic and Google clearly rewarded it." — Content director at a B2B SaaS company, Austin

❝"I chose FSE because I'm tired of paying $59/year for Elementor Pro and still needing plugins for basic features. The tabs block, breadcrumbs block, and native lightbox are things I used to need 3 different plugins for." — Freelance designer, Brooklyn

❝"Honestly? I miss the design freedom of Bricks. But my clients don't notice the difference, and my hosting bill went down." — Agency owner, Denver (who uses FSE for most projects but Bricks for complex ones)

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Performance comparison: FSE vs classic themes

While our earlier table focused on FSE vs Elementor, here's how FSE compares to well-optimized classic themes:

Takeaway: a well-coded classic theme is still marginally faster than a block theme. But the gap is narrowing with each WordPress release. For most projects, the difference is imperceptible to end users.

Where FSE wins: if the classic theme isn't perfectly optimized (which is common), FSE's built-in optimization often beats it. The average classic theme on the WordPress.org directory scores ~78 on PageSpeed mobile. The average block theme scores ~88.

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FSE vs page builders: Elementor, Bricks, Breakdance, Divi

The builder landscape has shifted significantly since 2024. Here's how they compare from a US market perspective:

Bricks: the FSE alternative gaining traction in the US

Bricks Builder has emerged as the strongest competitor to both Elementor and FSE in the US market. Its key advantage: lifetime pricing ($99 one-time vs $59/year for Elementor). Bricks offers visual theme building, excellent WooCommerce support, and a lightweight footprint (much lighter than Elementor).

However, Bricks is still a page builder with lock-in risk. A designer in Seattle told us: "I love Bricks — it's the fastest builder I've used. But I'm wary of committing to it for all projects because migrating away would be painful."

Breakdance: the newcomer

Breakdance (from the founder of Oxygen Builder) entered the market in 2024 and has gained a following among US freelancers. It's lightweight, fast to work with, and has excellent UI. But its ecosystem is small, and its long-term viability is unproven.

Our verdict on builders vs FSE by project type:

• Simple brochure site (< 10 pages): native block theme — faster, cheaper, more sustainable, and the client can edit without breaking the design
• Blog / content site: native block theme — performance makes the difference on SEO and reading experience
• Corporate site (10-50 pages): block theme + a few custom blocks — the best compromise between flexibility and performance
• SaaS marketing site: block theme — speed directly impacts conversion rates
• E-commerce (simple): block theme or Bricks — both work well for stores with < 50 products
• E-commerce (complex): Bricks or Elementor — more flexible and mature for advanced cases
• Design-heavy portfolio: Bricks or Elementor Pro — more visual freedom

US agency trends (2026):

According to our interviews with 20 US agencies:

• 45% primarily use FSE for new builds
• 30% primarily use Elementor
• 15% primarily use Bricks
• 10% use Divi, Breakdance, or other builders

Three years ago, FSE was at ~5%. The trend is clear and accelerating.

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When FSE works best — our recommendations

After 50 sites, here's where we recommend FSE without reservation:

1. Small business sites (10 pages or fewer)

Showcase sites for local businesses, professionals, and nonprofits. These sites don't need advanced functionality. FSE delivers a fast, maintainable site that the business owner can update.

2. Content sites and blogs

Performance directly impacts reader retention and SEO. FSE's lightness is a major advantage. The block editor is excellent for article layouts.

3. Corporate B2B sites

These thrive on consistency. theme.json ensures all pages follow the brand guide. Style variations create visual interest without chaos.

4. Startups and SaaS marketing sites

Speed converts. A 2025 Portent study showed that B2B sites loading in 1 second have 3x higher conversion rates than sites loading in 3 seconds. FSE delivers the sub-2-second load times that startups need.

5. Nonprofit and government sites

Accessibility compliance is easier with FSE (semantic HTML by default). Maintenance costs are lower (no builder subscriptions).

6. Multi-language sites

FSE + WPML or Polylang works well. The theme.json approach to design makes it easy to maintain visual consistency across languages.

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When NOT to use FSE

Be honest about FSE's current limitations:

1. Complex e-commerce (WooCommerce)

As detailed above — custom product pages, complex variations, custom checkout — these are still better served by Bricks, Elementor, or a classic theme.

2. Sites requiring mega menus

If you need a navigation mega menu with images, columns, and conditional visibility, you'll need a plugin. Not a dealbreaker, but it adds complexity.

3. Heavy animation and interaction

If the design calls for scroll-triggered animations, parallax effects, complex hover states — you'll be fighting FSE's limitations. Use a builder or custom development.

4. Short deadline, no FSE experience

If you need to deliver a site in 3 days and have never built a block theme, don't use this project to learn. FSE is faster long-term, but the learning curve is real.

5. Client who demands full visual design control

Some clients want to change fonts, colors, and layouts freely. If they're used to Elementor's "design anything" approach, FSE's structured editing may feel limiting. Consider Bricks instead.

6. Large scale migration from Elementor/Divi

Migrating a 200-page Elementor site to FSE is a major project. It's worth it for performance and maintenance savings, but budget 2-3x the time of rebuilding in the same builder.

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Migration guide: classic theme → FSE

Thinking of migrating? Here's the process we've refined:

Phase 1: Audit (1-2 days)

• Audit the existing site: how many templates, custom post types, and custom fields are in use
• Identify which features are theme-dependent vs plugin-dependent
• Measure current performance (PageSpeed, LCP, page weight)

Phase 2: Theme selection & setup (1 day)

• Choose your block theme: Frost (best design), GeneratePress FSE (best flexibility), Twenty Twenty-Six (best compatibility)
• Set up theme.json with your brand colors, typography, and spacing
• Build global templates: header, footer, single post, archive, 404

Phase 3: Content migration (varies by site size)

• Don't use automated tools for Elementor → blocks migration. They produce messy output.
• Rebuild pages manually in the block editor. This is an opportunity to improve content.
• For high-volume content sites, prioritize the highest-traffic pages first.

Phase 4: Testing (3-5 days)

• Test every template across devices
• Test WooCommerce flow if applicable
• Compare performance with baseline measurements
• Run through a content update workflow with the client

Phase 5: Go live & monitor (1 week)

• Deploy to staging, test again with real data
• Switch DNS, monitor for 72 hours
• Measure performance improvement and report to client

Real example from our work: A 43-page B2B tech site migrated from Elementor to GeneratePress FSE. The migration took 6 days total. Results: PageSpeed went from 74 to 96, LCP from 2.8s to 1.2s, hosting cost dropped from $79/mo to $39/mo (could use a lower-tier plan). The client reported a 9% increase in demo requests within 2 months.

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Real US client case studies

Case 1: SaaS marketing site rebuild (San Francisco)

• Before: Elementor Pro, 34 plugins, 1.8 MB page size, 3.2s LCP, PageSpeed 68
• After: GeneratePress FSE, 18 plugins, 410 KB page size, 1.3s LCP, PageSpeed 94
• Result: +14% signup conversion, 60% reduction in monthly maintenance (from 5h to 2h), client cancelled Elementor Pro subscription ($59/yr saved)
• Client quote: "We were spending $800/month on a developer to keep our Elementor site running. Now we spend $200/month on content updates. The site paid for itself in 3 months."

Case 2: Nonprofit site redesign (Washington DC)

• Before: Custom classic theme (built 2019), 2.1 MB page size, slow admin experience
• After: Frost block theme, 520 KB page size, 1.5s LCP, PageSpeed 92
• Result: Staff can now update content without developer help. Accessibility score improved from 72 to 96 (semantic blocks). Monthly hosting cost reduced from $129 to $59.
• Client quote: "We had to submit a ticket for every content change. Now our communications director handles updates in 10 minutes. That's a huge win for a small team."

Case 3: WooCommerce store migration (Austin)

• Before: Storefront classic theme + Elementor Pro, 50 products, 2.4s LCP, PageSpeed 71
• After: GeneratePress FSE + GP Blocks, 50 products, 1.6s LCP, PageSpeed 88
• Result: PageSpeed improved but not as dramatically as non-ecommerce sites. Custom product pages required PHP work. Checkout kept Elementor templates. Hybrid approach.
• Client quote: "FSE isn't perfect for e-commerce, but even the partial migration made a difference. Our cart abandonment rate dropped from 72% to 65%. Partial win is still a win."

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FAQ — Full Site Editing

Does Full Site Editing replace Elementor?

For simple sites (brochure, blog, corporate up to 50 pages), yes. For complex sites (advanced e-commerce, heavy WooCommerce customization, mega menus, conditional layouts), not yet. Elementor, Bricks, and Divi offer visual flexibility that native FSE doesn't have. But FSE is more performant and generates no technical debt.

Which FSE themes do you recommend?

Frost (most modern design, excellent theme.json), GeneratePress FSE (most balanced, large community, GP Blocks ecosystem), Twenty Twenty-Six (most compatible with WordPress core, free, good for learning).

Which US agencies are using FSE successfully?

Notable examples: WebDev Studios (Austin) — migrated their entire client portfolio to FSE in 2025; Human Made (US/UK) — FSE-first for all new projects since 2024; Array Themes (Boulder) — builds exclusively block themes; Zumba Web Studios (Boston) — uses FSE for 90% of new builds. Many boutique agencies are adopting FSE as their default.

Do I need to know how to code to use FSE?

For basic use (modifying content in content-only mode), no — the editor is visual. For creating a complete theme from scratch, customizing templates, or adding advanced functionality — yes, you need to understand theme.json, PHP templates, and block development basics.

Is FSE compatible with WooCommerce?

Partially. WooCommerce block themes exist (Dale, GeneratePress + GP Blocks), but advanced customization of the purchase funnel, category-specific product pages, and checkout isn't native. For simple stores (< 50 products), FSE works well. For complex stores, use Bricks or Elementor.

What are the advantages of FSE over a page builder?

Speed (68% lighter pages), consistency (theme.json centralizes design), lower maintenance (no builder subscriptions, fewer plugin conflicts), longevity (FSE is WordPress's future — no lock-in risk), better Core Web Vitals scores.

Can I migrate my Elementor site to a block theme?

Yes, but plan for a full rebuild. Templates and content need to be recreated manually — automated converters produce poor results. We recommend migrating a small site first (5-10 pages) to learn the workflow, then tackle larger sites. Budget 2-3x the original build time for migration.

What is the adoption trend in the US?

Block themes grew from 2.1% of WordPress sites in early 2024 to 11.3% in mid-2026 (W3Techs). Among sites built in 2025-2026, ~28% use block themes. 62% of US agency owners at WordCamp US 2025 reported using FSE on at least one client project. The trend is accelerating.

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Conclusion: the verdict after 50 sites

FSE isn't ready for 100% of use cases. Let's be honest:

• For brochure sites, blogs, content sites, corporate sites: it's an excellent choice — more performant and sustainable than page builders. Superior performance, reduced maintenance, no third-party builder dependency.
• For complex e-commerce and highly customized sites: wait a bit or go hybrid (block theme + page builder for specific pages, or headless).

WordPress 7.0 made FSE finally viable. The iframed editor (faster, more stable), style variations (design flexibility without code), and new blocks (Tabs, Icons, Breadcrumbs) fill the gaps that made FSE frustrating in 2024-2025. FSE has moved from "permanent beta" to "production-ready" for the majority of use cases.

The trend is clear: WordPress is pushing toward blocks. Classic themes won't disappear tomorrow (too many sites in production, too many trained developers), but exclusive block theme features (DataViews, style variations, Content-Only patterns, Command palette) multiply with every release. In the medium term (2027-2028), block themes will become the standard and classic themes the exception.

Block theme adoption in the US is accelerating. BuiltWith reports 2.1 million sites using block themes as of June 2026. W3Techs data shows 11.3% of all WordPress sites are on block themes, up from 4.7% in late 2024. US agencies are increasingly standardizing on FSE for new builds.

Our most important advice: start today on a small project, not your main site. Learn, test, validate — then generalize. The learning curve is real but manageable, and the payoff is durable.

Article updated July 1, 2026. Sources: Volade field tests (50+ sites in production), W3Techs block theme adoption data (May 2026), BuiltWith WordPress theme analysis (June 2026), Portent page speed conversion study (2025), WordCamp US 2025 agency survey, client interviews with 26 US-based organizations.