SEO impact, server-rendered Hyvä vs SSR-React PWA Studio?

Hyvä is server-rendered. Crawlers receive fully-formed HTML, structured data renders immediately, no hydration gap, no escape-fragment dance. SEO works out of the box, same as old-school PHP rendering.

PWA Studio needs careful SSR config to avoid leaking rankings: Apollo SSR setup, cache hydration on the client, fallback HTML for crawlers, escape-fragment cleanup, route-level meta-tag injection. Many real PWA Studio implementations leak rankings during build complexity, the dev team optimises for the React experience and Googlebot times out before hydration completes. We’ve seen production stores drop 30-50% organic traffic in the first 6 months post-PWA-launch and only recover after a 6-figure SSR-tuning project.

If SEO is in your top-3 reasons for the rebuild, Hyvä is the safer answer.