You can accomplish this with most VR hardware now but it's not very good. The issue is that text is hard to work with in VR (for the complex reasons the article describes). The eyestrain is also incredible.

I've tried working in VR on side projects. It sucks after an hour. Granted, I have a Samsung Odyssey+ from a few years ago.

The PPD talking point is absolutely a problem. If my particular headset had the ability for "many floating windows" arranged in arbitrary places, it might be better (but it doesn't - I think there's a desktop app for Meta Quests which supports this though).

So, aside from the eyestrain due to low PPD, it is legit amazing, and I could potentially have productive workdays in VR with the right system. I also purchased the counterweights which help quite a bit.

How does one exit out of 3d vim?

Its author did recently, but it might be hard to reach him.

Carefully, so as to not accidentally exit the simulation