(detailed use case) => detailed reasoning

i've been having fun building with astro on cloudflare workers... i have a few apps that have API endpoints, content, and react/svelte components all glued together in one codebase. it's been relatively easy to add drizzle and cloudflare's D1 database to handle data stuff alongside everything else.

Does not using it count as alternative?

React Router 7 is all you need. You could also use Next.js @ 15.1 with strictly static generation and freeze at that version. Use next routing for statically generated pages and React Router for dynamic pages.

I would go with https://tanstack.com/ as that has components to replace almost all Next.js features.

Just don't use it. NextJS is not needed, the concept of BFF is just marketing.

Use Astrojs if you need something.