I did it a while back to see if I would notice anything different. I moved to vim a few years ago on a whim after using emacs for decades, so I am far from a vim power user, but with the modest configuration I use, I couldn't tell any difference, so I figured I would keep using it until I ran into a situation where neovim failed in some way that vim didn't. So far (maybe 6 months?) I haven't run into any issues, and I don't think I've added any plugins to my setup that would only work with neovim. This is all to say, it's probably a fairly easy experiment to switch with a fairly low risk of issues if you switch back.

I'm probably a bad neovim reviewer though since I'm not really keen to try the LSP stuff. I wind up working in a lot of different languages and inevitably I feel like getting accustomed to completion working well in language A only to have it fail with B is more annoying than having no completion at all. I'm curious whether I'll wind up using anything which is only possible in neovim.