I don't know if I buy this as useful, but cool that it's an option:
That's actually even better than what I had originally suggested, as here it's also suggested to use CapsLock with a dual purpose as well - Control when held down and Escape otherwise. I have no idea how this never came to my mind, but it's truly epic! A crazy productivity boost just got even crazier!
From <a href="http://emacsredux.com/blog/2017/12/31/a-crazy-productivity-boost-remapping-return-to-control-2017-edition/">http://emacsredux.com/blog/2017/12/31/a-crazy-productivity-boost-remapping-return-to-control-2017-edition/</a>