(3) people who never had that capability.

Remember we aren’t all above average. You shouldn’t worry. Now that we have widespread literacy, nobody needs to and few even could recite Norse Sagas or the Illiad from memory. Basically nobody has useful skills for nomadic survival.

We’re about to move on to more interesting problems, and our collective abilities and motivation will still be stratified as it always has been and must be.

I don't think it's down to ability, I think it's down to the decision not to learn itself. And that scares me.

>We’re about to move on to more interesting problems, and our collective abilities and motivation will still be stratified as it always has been and must be

Who is "we"? There are more people out there in the world doing hard physical labor, or data entry, than there are software engineers.