Yes, there is some selection bias both ways ;-) To be fair, the reason you haven't seen anything better is because very few people are able to get traction in

Yes, there is some selection bias both ways ;-) To be fair, the reason you haven't seen anything better is because very few people are able to get traction in the face of deep, deep entrenchment. Have you watched Bret Victor's "Kill Math" video? Imagine if most technical courses had that kind of interactive material. But right now, they won't, because the barriers to entry are artificially high and incumbents aren't innovating.