> especially given the CTO's desire to also migrate off of Next.js

To Remix?

I think remix is a lot better. But the problem is that the team behind it (same as react router) have spent the last 10 years changing their mind every Tuesday and rewriting everything and breaking every API, it’s a cat and mouse game of chasing their latest idea all the time.

Btw, remix itself is deprecated. There you go.

What would I use? For sure I’d go with a MUCH saner and stable approach: inertia.js as the glue between React and a real full stack batteries included framework such as Adonis, Laravel or Rails.

Didn't get far enough along to understand the motivations and considered alternatives.