Next.js

Next.js solves everything React leaves open: file-based routing, server or static rendering as it suits, optimized images and metadata for SEO. This site (bilingual, with an MDX blog, an interactive laboratory and a private area) is built entirely on its App Router.

The pace at which it evolves is a double-edged sword: every major version brings real improvements and also new concepts to learn. And it's worth being aware that its best tricks perform better on Vercel, which ties you a little to the ecosystem.