Not to get too off topic, but I’m one of those people who uses readline system-wide for everywhere that isn’t Vim normal mode. That is to say, ctrl-h isn’t too shabby of a delete alternative 
I know it’s a chord for a common action, but I do find find myself often pressing capslock, realizing I don’t actually want to use control, but needing to pause for a second to prevent escape from being sent, so I have limited the number of tap/hold keys I have to one.
sodapopcan
2
pierrelegall
tl;dr: I remap Caps lock to Shift 
I never used Caps lock ever. My desktop keyboard is a Typematrix 2030 since ~2012, where the left Shift key takes the place of Shift and Caps lock compared to a classic keyboard. So to avoid mistypes due to my muscle memory on other keyboards (e.g. on my laptop), I remapped Caps lock to shift.
But as a non Mac user, the best move I did is to switch left Control and left Alt to replicate the Mac Command key experience. It’s just a game changer.
More over, I use a custom Colemak layout. It just change some Alt Gr inputs for french characters without dead keys and for useful characters for devs.
1
hubertlepicki
You missed one option: “There is no Caps Lock on my keyboard”.
I use UHK keyboards and neither v2 nor v1 has it.
2
kirillrogovoy
Remapped with Karabiner.
Tapping Caps Lock is a single Cmd+Tab (alternate between two latest apps)
Holding Caps Lock + tapping a letter opens/focuses a given app (e.g. C for code, B for the browser, “I” for the terminal, M for mail, and so on)
Holding Caps Lock + tapping a number changes the workspace (up to 5)
1
seeplusplus
I did this - remapped to control - long enough to see if it would change my life. It did, so I bought an Ergodox EZ, and haven’t looked back since.
1