I find the built in MS editor decent. Nothing wrong with it...
Many touch typists don't want to lift their fingers from the
asdf/jjkl; key position just to go find a delete key or backspace.
Those keys are at different places on various brands of keyboards.
Emacs, and even the old Wordstar editor, had control key combinations
that were under the fingers, and (aside from the control key itself),
always at the same places. You can type reflexively, without losing
some focus on code.
Don't you find the constant repositioning distracting? Even something
simple like cursor position--those keys are sometimes at the right
side, sometimes at the bottom,.etc. How do you avoid the distraction
of having to hunt for keys?
MS's standard keyboard mapping doesn't even have a
'kill-to-end-of-line' command. (I know, VS now has control-L, but kind
of an afterthought to their 'standard').