Next.js App Router in Production

The App Router is genuinely great. But there are things you only learn by running it in production...

Server Components Are a Paradigm Shift

The mental model takes time to internalize. You will accidentally put client-side state logic in a Server Component at least once.

Caching Is Powerful and Confusing

The layered caching model — fetch cache, route cache, full route cache — is powerful but requires careful thought.

My Take

Ship it. The developer experience improvements are real and the performance gains are measurable.