Personally, I love App Router: it reminds me of the Meta monorepos, where everything related to a certain domain is kept in the same directory. For example, anything related to user login/creation/deletion might be kept in the /app/users directory, etc.

But I really, really do not like React Server Components as they work today. I think it's probably better to strip them out in favor of just a route.ts file in the directory, rather than the actions files with "use server" and all the associated complexity.

Technically, you can build apps like that using App Router by just not having "use server" anywhere! But it's an annoying, sometimes quite dangerous footgun to have all the associated baggage there waiting for an exploit... The underlying code is there even if you aren't using it.

I think my ideal setup would be:

1. route.ts for RESTful routes

2. actions/SOME_FORM_NAME.ts for built-in form parsing + handling. Those files can only expose a POST, and are basically a named route file that has form data parsing. There's no auto-RPC, it's just an HTTP handler that accepts form data at the named path.

3. no other built-in magic.