[mattengi]

In linux, if you want to make Capslock as both ESC and Ctrl,

    $ setxkboption -option -option 'ctrl:nocaps'
    $ xcape

https://github.com/alols/xcape

What is good for?

  - Happy with vim
  - Happy with emacs like - readline - keybinding. C-a, C-e, C-u, C-k, C-d, C-h, C-w, C-p, C-n, C-y ...
  - Ctrl key is most used in any gui application.

You can abandon both bottomleft Ctrl and topleft Esc.

[StavrosK]

How does that work? Pressing it alone is escape, pressing it in combination with another key is Ctrl?

[mattengi]

Yes

[keenerd]

If you use Emacs, I've heard great things about used xkb to remap spacebar to control, and using xcape to make control generate a space when tapped. It sounds messy but now you'll get emacs thumb instead of emacs pinky.