Greatness and popularity sometimes stand together. I think there are some types (or directions) of “great music” and ATYCLB has a different one with that Pop has.
Interesting take! Greatness can definitely take different “traffic road” depending on the era and audience, ATYCLB travels one that's introspective and spiritual, while Pop veers toward experimentation and edge. And yes, U2 recognizing Taylor Swift’s presence shows how different paths of greatness can still cross with mutual respect.