* VIM Keybindings: I have muscle memory of Vim.

Helix is strongly inspired by vim, but it is not attempting to be a drop-in replacement, and it is not possible to configure it to have the same behavior as vim with custom key-bindings because there are many things that work fundamentally differently between the two editors.

FYI (for OP): check this fork out https://github.com/usagi-flow/evil-helix

It's a soft fork trying to catch up with the main codebase. It feels like a second class citizen. Features introduced in Helix might not be intended for usage with vim keybindings anyway.

Only extension system, but honestly I've never missed it in 3y of usage coming from nvim.

vim keybinding. helix doesn't have vim keybindings. it might or might not be better but it isn't vim keybinding.

Its keybindings aren't identical to vim. They're very similar in many places, but are also different in quite common things like deleting lines etc. (dd vs xd)