I've had this discussion before with ed-tech disruptors, and beyond the points you mention, is another more subtle but more important one: every problem a child

I've had this discussion before with ed-tech disruptors, and beyond the points you mention, is another more subtle but more important one: every problem a child has outside of the classroom presents itself as a barrier to learning inside the classroom. That means poverty, bullying, abuse, anxiety, undiagnosed illnesses... all of that shows up in the classroom. Teachers know this, and continually deal with it when they recognize it and have the opportunity to deal with it. This simple fact informs everything about education, and no reform is possible without understanding and accounting for it. And anything any disruptor attempts to do will be deeply, pervasively affected by this fact. And none of them seem to give a fuck, though they would if they spent 10 minutes talking to a teacher about it.