Performance — does Hyvä work for catalog-heavy electronics stores?

Yes — Hyvä is actually better suited to catalog-heavy stores than to brand-storytelling stores, despite the marketing focus on the latter.

Why: Hyvä replaces Luma’s ~3MB of JS (jQuery + RequireJS + KnockoutJS + UI components) with ~150kB of Tailwind + Alpine.js. On category pages with 60 product cards (typical electronics listing), this matters compounds — LCP drops from 3.8s to 1.2s, INP from 280ms to 80ms, and the browser stays responsive while scrolling. On catalog-heavy stores, page weight is the dominant performance variable, not template complexity.

Real numbers from a 60k-SKU electronics build I shipped in 2025:

• Lighthouse mobile: 96 (homepage), 94 (category), 92 (PDP).
• LCP: 1.1s mobile, 0.7s desktop (75th percentile, real-user data).
• CLS: 0.02 (well under the 0.1 threshold).
• INP: 78ms (well under the 200ms threshold).

Caveats: (1) Hyvä is a paid theme (€1,000 one-time per project licence + extension licences) — budget for it; (2) some legacy extensions don’t have Hyvä compatibility patches — check your stack before committing; (3) PWA Studio / pure-headless is overkill for 99% of electronics stores — Hyvä gives 95%+ of headless performance with 30% of the build cost.

Verdict: Hyvä is the default for new Magento electronics builds in 2026. Skip Luma.