I've been running a SaaS on Next.js + GraphQL for 4.5 years now, sticking to Pages router has eliminated most of the complexity.

I recently rewrote my auth to use better-auth (as a separate service), which has allowed me to start moving entirely off Next.js (looking at either React Router 7 or Tanstack Router).

Back when I started, Next.js made server side rendering incredibly easy, but it turns out I didn't need it. My marketing site is entirely static, and my app is entirely client rendered.