I really want to switch to Luanti, but without equivalents to create and ae2 (at a bare minimum) I can’t see myself playing it for any significant time.

I actually had to look it up as I couldn’t remember why I made the first switch. PolyMC was forked from MultiMC after they dropped third-party modpack support. Then there was some drama with one of the devs of PolyMC, spawning Prism Launcher

Compose key

vimtutor, which I believe is installed with vim by default

Edit: My brain apparently inserted an extra word that made it seem like you were seeking said program. Leaving it though for those wondering in the future.