@cks @b0rk like how avy-mode¹ recommends binding Ctrl-: in its default docs², with the consequence that it's unusable by folks who use terminal emacs (or a combination of GUI and terminal emacs panes connecting to a shared emacs daemon). Unless they're wizardly enough to feel comfortable reading all documentation about it when an interpretation filter in their brain!

¹: karthinks.com/software/avy-can

²: github.com/abo-abo/avy?tab=rea