[bananicorn]

This looks a lot like a joke-question, but whatever.

Well, technically it's possible to write an OS in React, if you're basically just running a browser and do everything inside that.

Since a lot of desktop apps nowadays are just repackaged versions of chrome with a single website in them, you might actually have a better user experience for /some/ use-cases.

But if you actually plan on doing that, please just make an browser-based OS that is a wrapper for this site:

http://www.windows93.net/

Edit: I'm only answering semi-seriously because sometimes it's the stupid and laughable questions that foster new, maybe even completely unrelated ideas.