Ah, perhaps I should have said something like "educational materials, and apps, and other
useful things" (disapproving judgement in the original).
> Well, the thing is that the educational materials are largely free.
A triumph and fruition of these last decades of massive effort. Now we just need to deal with their quality (with commercial as bad as free). AI may help, by reducing barriers to content creation - you might for example, now more easily author an intro astronomy textbook, one that doesn't reinforce top-30 common misconceptions, something the most used (US; commercial) texts still don't manage.
