I sure hope mainline Vim isn't dead. I keep trying NeoVim but I prefer using Vim in a GUI and no NeoVim GUI I've found has the level of polish that MacVim [1] has. VimR [2] comes close but keep finding myself going back to MacVim.

[1] https://macvim.org/ [2] https://github.com/qvacua/vimr