I've been using kakoune for the past 2-3 years and it has been great. My main reason for switching from vim was the adherence to the Unix philosophy, but the editing model has been great. Seeing your selections change after each command + the clippy help text when entering a different "mode"^1 has made learning different editing patterns very easy. The only thing I really miss from vim is the number increment/decrement shortcut. There is a plugin for it, but I haven't tried it out yet (incrementing each selection by a different amount hasn't come up often enough for me).

^1: kakoune doesn't have multi character shortcuts. You create a "mode" which works basically like a namespace for keystrokes (https://igor-ramazanov.github.io/doc/pages/modes.html).