The "when not pressed with other keys" stuff is interesting. I never thought about that. The only trouble I can see with this is being unable to type effectively on a normie keyboard. I've had the ctrl/caps swap for years and I regular mess it up on a normie keyboard, although it's no big deal to accidentally press caps, of course. What I like is my portable mechanical keyboard has a physical switch, so it works whatever computer I plug it in to.