Astro, Nuxt, SvelteKit, SolidStart, React Router (prev. Remix), among others

Vite has plugins for MDX, SSR, etc. You can easily build your own framework if you want in a few hundred lines of glue code.

The criticisms of Next / React are so ubiquitous you can metaphorically gesture in their direction and most people know what's up. It's like wondering why someone said "ai slop" and didn't provide an expose on the quality of AI writing.