Sure, Acme lacks - well: intentionally does not have - theming, font changing etc., although some modifications (like Acme2k) exist which change that. Acme is probably more about "getting things done" than about "looking good" ... :-) (that sounds harsher than intended - I like Emacs for its flexibility and it was my Usenet reader until last month).

Interestingly, the first Emacs "plumber" which I have found after you wrote it literally uses Acme's plumber: https://github.com/alcah/sink.el

I wish Emacs had 9P support though.