I also have to suspect that the depth of the knowledge you get from reading real textbooks (and working the problems) is more profound than you're ever going to

I also have to suspect that the depth of the knowledge you get from reading real textbooks (and working the problems) is more profound than you're ever going to get from a MOOC, no matter how well put together. I'm a bit behind you - I'm just finishing up my (third lol) re-read of my old undergraduate calculus textbook but one of these days I'm going to get around to real analysis. I'm pretty sure that a really good understanding of calculus still puts me in the top 5% of American adults.