I don't see this as ungracious. It's not as if he's saying Khan Academy went in the wrong direction. He's just noting improvements that could be made on their c

I don't see this as ungracious. It's not as if he's saying Khan Academy went in the wrong direction. He's just noting improvements that could be made on their current environment. Every new "beginner" programming environment that I've seen has similar flaws. Bret's just pointing them out.