I think the point GP is trying to make, is that tech literate people where even smaller before, not that all the people with consumer devices has reached tech literacy, but also now ironically thanks to tech, we're more exposed to the tech illiterate individuals who are using this devices.

Sadly, I'm not as confident as he is. I remember acting as tech support for my family who was of course tech illiterate. A common theme was to receive a complain of "something not working on the system" without further explanation, which was perfectly understandable even if frustrating. Nowdays, I receive the same kind of complains from developers at work.