[shamiln]

I wonder if React UI should really be replaced with NextJS.

The majority of react sites nowadays are just NextJS. It might be that the future of react based applications isn’t react, but nextjs.

[tracker1]

And how exactly would you go about TFA's example of embedding the web ui inside a Golang application with NextJS?

I can think of LOTS of examples where you'd be better off with straight static server with React and a separate API server... pretty much anywhere you are doing a web application and don't need/want SEO/Bots.