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yup. i find binding ctrl <-> caps way more useful than binding ctrl to esc (and my keyboard even has a ctrl key made for the caps place and a caps key made for the ctrl position).

BUT there's also a way to do something like: if you press and hold caps, it acts like control. but if you press and release quickly it acts like esc. stevelosh describes how to do that on osx here http://stevelosh.com/blog/2012/10/a-modern-space-cadet/#cont... but i still haven't found a way of doing that on linux.

See link to xcape in this thread.

C-[ is trivial in an English keyboard, but in the Spanish layout it's an awkward three-key chord. I use the latter, and I've been happily inoremapping jj to <esc> for a decade.

So your suggestion is that, rather than pressing Caps Lock to escape, one should press Caps Lock and [? How is that better (assuming you’re using VIM)? Regular Ctrl isn’t hard to reach.