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Re:Ultimate Hacking Keyboard by ithkuil on Friday September 14, 2018 @05:35PM (#17991165)
Ctrl-c can be used to exit insert mode as well. Caps-lock key was also historically the location of the ctrl key.
Re:Ultimate Hacking Keyboard by Lio on Friday September 14, 2018 @05:44PM (#17991238)
Ctrl-c is a poor substitute for escape as it messes up your history and stops things like mutiline visual inserts working.

You’re better off using ctrl-[ which is exactly the same as escape in functionality.