I think it’s more of a bell curve. Andrej and I clearly have different definitions of fun, if he doesn’t think deep learning is fun. In fact I’d say I’ve only learned anything when I’m having fun. I might add almost every time I’ve sweat it’s been out of fun. I’ve never gotten a good workout from “vegetables” (though I like vegetables). Being miserable might work for him, but I don’t know if this advice is generalizable (his point is not entirely terrible, but maybe taken a little far. I think the problem is less “is this entertaining” and more “is this deeply enganging”