That's one of the most commonly used shortcuts I use. Not just in vim, but also in the shell. When I screw up on my typing, the mistake is often 3 or more letters back. Instead of hitting backspace a lot or moving the cursor and retyping mid-word, I prefer to say "screw it", hit Ctrl-w, and retype the word. It's faster. My brain is just not optimized to type pieces of words. I can't use muscle memory then.
Besides that, I don't know about you or dmitryminkovsky, but I remapped it to Caps system-wide, so by remapping to Ctrl, I'd be losing a lot more than those shortcuts you mentioned. On the other hand, CapsLock has always been a useless key to me. When I want to type in all-caps, it's less confusing/error-prone to just hold Shift with my pinky while typing. Also, Caps is in a much easier place to hit than Ctrl, so it's more fitting for a key that I hit a lot.
* Ctrl if held and used with other keys.
* Esc if pressed and released on its own.
There's no reason to press and release Ctrl on its own (minus games), and you never need to chord Esc with anything else, so they can both live on the same key.
Tell me about it!
> Mapping it to Ctrl is a much more sensible choice.
Never considered this, but just moved my pinkie to Ctrl and then to Esc and then to Ctrl... hmm... I use Emacs bindings in Insert Mode, wouldn't this interfere with them?
Added bonus: on MacOS, emacs keybindings work in pretty much every place where you can input text, so you get’em everywhere. It’s part of the Cocoa Text System: