Earlier quoted context omitted.
I nearly exclusively use VIm and any other editor I use has a VIm mode plugin installed. I pretty much can't work productively in anything else. I can tell you that I haven't used Esc in ages. I have Caps Lock mapped to Ctrl (as it is a vastly more useful a key than Esc and Caps Lock is a much better position for it and is just as an extraneous as Esc is). I use Ctrl-C or Ctrl-[ to exit insert mode and it works just…
Same. Been using vi as my primary command-line editor for 25+ years, and have never used the ESC key, and just use the default setup. I don't even know what commands would use the ESC key?
EDIT: Thanks for the replies, other people. I personally use ^C, I was curious what 'mozumder specifically used. :)