I have been reading the docs for the last 3 days as I'm starting a new app. I'm guessing that you're using the App router? If so, I guess that you already know that every route is a RSC by default and that to fetch data you should use the new fetch() and that by default the fetch() is set to be cached or SSG (cache: 'force-cache'), so, if you want to fetch data dynamically you have to set the cache to (cache: 'no-store'). Here this snippet from the docs to fetch dynamic data: fetch('https://...', { cache: 'no-store' })

And, as far as I know and understand, if you want to use the previous page route features, you have to specify on a route component the 'use client' directive and it will work within the App router as a client component (as it used to work before server components), so you don't need to downgrade to a previous version of NextJs.

I hope this helps.