[bleakenthusiasm]

I like the entire structure that they put up for their kids to learn and I think it would work for many children. However, I doubt it would work for many parents.

The author already pointed out that it worked because they both worked from home. To most this is an unimaginable luxury.

The parents didn't strictly supervise or guide the kid in this case but I strongly assume that they engaged if the kid had questions or just wanted to talk something through. They also apparently had specialized software and a 3d printer at hand or were ready to buy one without long preamble.

The kid's interests were rather easy to handle up until a pretty high level of skill. With writing games and building small stuff you can get very far without a large workshop, risky activity, rare or hard to buy supplies etc.

I'm not at all saying the public education system can hold a candle to the effectiveness of what was told in this article and we could definitely improve a gazillion things about it. I'm just saying that this kid a lot of lucky factors coming together for it to work out THAT well.