Speaking to my heart. I had Acme set up but it needs a good mouse to make it work. I use a trackball mouse, it doesn't have the three finger chords.
Fucking love the concept, but it'd take a lot of work to get the immersiveness of modern systems. e.g. completion/suggestions, linting, etc. none of it is built for plan9.
Ironic because plan9 is amazingly trackball friendly.
Also, if you code in Go:
https://github.com/jmigpin/editor
It diverges somehow from Acme, but it has autocomplete and a similar interface. I love it :)
acme2k has keybindings too, you can use these instead of chords
Set it up accordingly, you won't go back.
Acme under OSX shines.