it's not because engineers and inventors explicitly make things that only young people can learn Are you sure? Replace "young" with "inexperienced" and that's

it's not because engineers and inventors explicitly make things that only young people can learn Are you sure? Replace "young" with "inexperienced" and that's exactly what I see in most new software: the focus is on the broadest userbase possible, which is entry-level products and UIs. Nobody's focusing on making expert tooling, everything is geared towards the lowest common denominator -- because supposedly that's where the money is.