I have colleagues that capitalise by toggling caps lock on and then off again so the efficiency gains might be real for them lol
Well, on most keyboards there aren't actual keys, but instead shift-F1 through shift-F12 produce F13-F24.
did you know that c-a c-e c-n c-p c-d work everywhere in macOS like they do in emacs?
I do use the Backspace key a lot though. :-)