Heh, I uses a similar keybinding, "jk", for escape that I can't get out of muscle memory. Works well enough in vanilla Vim and Emacs, but causes much pain in other Vim bindings, namely IntelliJ.

Even if you do get it to work, you usually have to wait for the keypress timeout to detect the command. The sequence is something like:

- Enter insert mode.

- Press "j"

- Nothing appears until 40 ms later, when keypress timeout passes and the logic falls back to insert a "j" character.

I think Vim and Emacs use a fancier undo-mechanism, where they always insert the "j" and then delete the "j" if a command completes before the timeout in order to hide the latency.