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I'm happy with NeoVim, which I think I've been using for about two years now? Features are nice.
One thing to recommend old vi over it though, is that NeoVim somehow crashed so hard when I tried to open a 20 GB file that I literally got logged out.
After logging back in, vi took about a minute to open it with no problem.
Maybe it was a NeoVim plug-in, rather than NeoVim itself, though.