I could never see the need to rebind Ctrl to Caps Lock (and I do use Emacs). Whenever it's time to press Ctrl, I curl my pinky and press that key with my pinky's distal joint. I did, however, swap Fn and the Global key on my Mac.

I think that's reason enough to rebind Ctrl to Caps Lock. I used to do the same, but why go to the trouble when I can remap Caps Lock once and be done with it?