Aubrey Portwood
Senior WordPress Developer, Stoic, Girl-Dad², Tennis Player, INTJ,
Enneagram 1, & Vintage Computer Tinkerer — based in Albuquerque, NM.

Enable Holding Down a Motion Key in Vim/Vintage Mode in Sublime Text 3

The documentation seems wrong, you should use:

defaults write com.sublimetext.2 ApplePressAndHoldEnabled -bool true