As a vim, linux, shell guy, I still love my mapping of Caps Lock pressed to CTRL und Caps Lock released to ESC.
Being able to reach CTRL and ESC with the little finger while keeping your hands on the home row keys is great.
By way of examples, I my favourites were a button to toggle light/dark mode, and the context dependant bit button.
As a vim, linux, shell guy, I still love my mapping of Caps Lock pressed to CTRL und Caps Lock released to ESC.
Being able to reach CTRL and ESC with the little finger while keeping your hands on the home row keys is great.