Sorry to chime being negative, but it takes you approximately zero because it uses the same paradigm as software you learnt years ago. It probably didn't take you zero time to learn how to open a file, what a files was, what a search-replace was, how it worked, etc, the first time you were confronted with it

Yes, that's my point. Emacs could, but does not integrate with the OS and established keys that well.

Spacemacs fixes some of that integration. cmd-X C V S all work. but no cmd-F or cmd-R

Well, the keybindings on emacs predate most other keybindings. I don't use it very often, but Cmd-F is forward-word, to move forward a word (heh.) For keyboards without arrow keys it is very handy (my oldest laptop didn't have them.) Cmd-R I have never used its binding (so I could rebind it, but what binding would you like to have in it? "Reload"?

sorry I mean cmd-shift-f which is usually find and replace.

and cmd-f is not the same as ctrl-f. in the emacs tongue it is referred to as s-f

predating is irrelevant. most of the younguns using text editors were born well after emacs was created.

Emacs is technically capable of being customized to suit established usage patterns. its only cultural stubborness that stops it.