How many jobs could you get with a Udacity certification versus an actual bachelor's degree? On that note, how many people took the AI classes at Udacity after getting an undergraduate degree at a 4-year institution?

Are you really comparing CMU with Udacity?

That's like comparing any Ferrari model with a Corolla. Not saying Udacity is bad. I mean a Corolla is a great, cheap, pragmatic and utilitarian car, just like Udacity is a great, cheap, pragmatic way to learn academic topics.

But you really can't compare the two things. Carnegie Mellon and Udacity are extremely different and non-comparable in any rational way.

Why not?