But then I stopped abruptly when realized Helix misses a key feature of Vim: swap files. I can just start editing and have not have to worry about losing my work, may whichever of computer panic, computer running off charge, environment (desktop env or tmux) crash, etc. occur.
So edit semantics is cool, but fundamentals like recovery should be got right before being a serious contender.
(I did a quick search to see if there is any news on this front, but what I found is all about "recovery hooks for panic", which is far more less than what's needed - it's about an emergency saving of the work if something goes awry with the editor. I need to be protected from loss if something goes awry with the environment too...)