I want to use the vi mode in bash but I find the ESC key a little bit too far, as for vim. The ideal can be to keep a key pressed, like ALT or the caps lock, to stay in command mode and be in insert mode when it's released. Have the option on all my system can be awesome!
In vim, my leader key is Space but it's not possible in insert mode. I don't know if it can help but I'm using tmux and zsh.
Is there a solution?