>Implying convenience is an objectively measurable quality that is the same for everyone.

This is obviously wrong. Convenience is completely tied to someone's particular uses. I don't see the point of using a phone for anything but phonecalls, I don't need the internet with me all the time, and I dislike small screens and small keyboards. Therefore, I have no use for smartphones.

I'm not going to do the same demonstration for privacy, but let's just say that there is no such continuum.