@pettter I believe the main issue is that the definition of "hard to use" is "type a secret passphrase" and as long as we don't have the magic brain wave interface, that's not going to change radically - regardless of crypto technology.
Perhaps the definition of "hard to use" could change if we stopped thinking that "[whatever from Open Whisper Systems] == effortless magic".
It's like noone would drink beer because you have to lift your butt from the sofa: https://social.umeahackerspace.se/attachment/57979