Should I migrate to Hyvä for my French luxury store?

Almost certainly yes if you’re on Luma. French luxury / fashion shoppers convert dramatically better on fast mobile experiences — and Paris-based luxury brands compete on UX polish:

• Lighthouse 95+ on Hyvä vs typically 40–60 on Luma luxury themes — Google ranks fast pages higher for category/PDP queries (huge for luxury SEO where competition is fierce).
• Hyvä Checkout loads in < 1s — 50% lower bounce vs Magento Luma checkout, especially mobile (which is now > 70% of FR luxury traffic).
• Cartes Bancaires + Alma BNPL widgets render natively without the React/jQuery double-render Luma has.
• Mondial Relay pickup-point selector renders instantly, no spinner-on-spinner on the map widget.
• Image-heavy luxury PDPs use modern <picture> + AVIF / WebP — image weights drop 60–80%.

Typical migration timeline: 4–6 weeks. Conversion lift in the first 90 days post-launch is usually 8–25% from speed alone.