Oh wow, that's very impressive! I'm curious what it would take to upgrade from React 17 with Next.js 12 to take advantage of all that.

We'll likely have a Next.js release that pairs with the React 19 release. The incremental upgrade there then will be about moving from Pages -> App Router. nextjs.org/docs/app/bui...

Upgrading: App Router Migration

Learn how to upgrade your existing Next.js application from the Pages Router to the App Router.

I am pretty sure it would be incremental, the App Router has different wording than the Pages Router but you can actually code in a very similar way, like fetching your data in pages etc.