I learned probably 90% of my math knowledge from YT videos and Kahn Academy. The fact is that the odds you get a decent teacher at a public school or even university are low, while the internet allows you to access the absolute best people in the world at explaining and conveying information for your selected topic.

it's like school choice at global scale, why learn from a person you happen to be geographically located close to at school when you can learn from the best? Combine that with some of the new AI personal tutor tools coming out and I don't see how traditional schooling competes beyond acting as day care while parents work. And even at the college level a huge number of professors are obviously not passionate or skilled at teaching their subject and class sizes are too large to give student specific feedback.

I'm really looking forward to when you can take a placement test and have AI look at your work and solutions and then tell you exactly where the gaps in your knowledge are and create a study plan. So many people struggle with math because they didn't properly learn lower level fundamentals and without a good tutor you can't figure out what you need to learn. I feel like AI is getting to a place where it can probably get there, something like the GPT and Wolfram Alpha integration