To be fair Next.js is just following the natural progression of what their product always has been: holding devs' hands in all things deployment at the expense of vendor lock-in. Being aware of Vercel's limitations is not about the open web, it just means you should be setting up servers yourself at this point.
This
I was talking to a fellow dev at the company I work at and he was extolling the virtues of one-click nextjs deployments. As the conversation progressed it turned out he'd never actually had to set up or manage his own servers and felt that it was a waste of time for him to learn.
It hurt my soul. I am considering linking this article, but i feel it may come across as aggressive.