You know, I've had experience teaching elderly and computer-illiterate people tech. It was much easier to teach them Windows in early 00s than iOS today, because the former, while looking more complicated, was also very consistent - once you explained the basics like drop-down and context menus and drag and drop, those things generally worked everywhere throughout the system, even in new apps they haven't seen before.

Conversely, with iOS, the problem isn't just that all those techniques are undiscoverable - it's that the tricks you learn for one app will rarely work in another. Well, that, and the fact that they regularly change basic UX, too, like removing the physical home button.