As someone who has earned over 3 million points on Khan Academy over a 3-4 year span about ten years ago, I am very appreciative of my experience. What I appreciated most is when Sal would derive formulas such as the quotient rule in Calculus from the power rule by using negative exponents. Deriving formulas rather than memorizing them opened up a new perspective for me.

This article appears to focus on the chat bot which I have not used and was not part of my experience. At the time, I had a subscription to Wolfram Alpha that was helpful if I got stuck on an intermediary step.

The high level of goal of the post which is directed at asking good questions raises a point that seems valid to me.