Earlier quoted context omitted.
What vim can do that emacs often is a little too slow for and IDE:s can't is to have finished even quite complicated incisions and changes to your text before you've become conscious that you asked it to do the thing. This means it can help keep out intrusions about editor maneuvering from your mind at work. Some people see no value to this and fill their vim bundle with plugins that slow everything down a lot, but s…
If you already have Caps Lock remapped to Control, why not just use Ctrl-[ to get back to normal mode? Ctrl-[ is the same keycode as escape in terminals, and it's much easier to reach. For me, remapping jk in insert mode results in lag after typing 'j'.
That little lag on the j doesn't matter, when you notice you're already a few keys ahead anyway.