For clarity, 'usability goal' I was referring to is plug-into-slot-blindly-with-your-eyes-closed.
I used the word 'usability' to attempt to imply UX, and I was deliberately avoiding commenting on speed, features, DRM, and the like, because those aren't delivered by USB type-C, which is only the plug. As you imply, those points are addressed by the jump from USB 2 to USB 3.0 or the type-C-compatible USB 3.1.
I used the word 'usability' to attempt to imply UX, and I was deliberately avoiding commenting on speed, features, DRM, and the like, because those aren't delivered by USB type-C, which is only the plug. As you imply, those points are addressed by the jump from USB 2 to USB 3.0 or the type-C-compatible USB 3.1.