the wmf mission statement, if it came true

Right now, Wx is primarily "static pages" - that is, pages rendered through HTML which just sit there while you read them, as a rule. Making them more interactive is an interesting suggestion -- possibly having automatic pop-ups for images, sounds, news etc. for any given article would make sense (not limited to those, by the way).

Alas - "exercises" are how our brains manage to store patterns about information - in the same way that a bowler gains "muscle memory" by practicing, so our brains gain "logic memory" from doing calculus exercises, etc. Wx can not change that, as far as I know <g>.