Next.js is a poor choice for a client-side application. It is first and foremost a server-side framework, and trying to force it to be client-side is to work against it. There are so many better options than Next.js for dedicated client-side front-ends.

Nextjs is also a bundler for web applications. And it deploys the front end assets.

It's yet another backend framework, added that it only runs on vercel infrastructure.

There are better front end and back end servers, those that simply rely on nodejs to serve. Next.js does that, without vercel.