That's pretty much what i've been getting at, but in the opposite approach. If the Stones had quit, say in 1970, I still don't think their work would be as popular, innovative, and influential as the Beatles was, but I think their status from a musicology standpoint would be higher than it is today. And indeed, the short lifespan of the Beatles certainly helps their cause. With the exception of Let it Be and perhaps Beatles for Sale, every album of theirs was tremendous and an event in of itself every time one was released. I give them a pass on Beatles for Sale because it was recorded in late 64 after their American and World tours, so fatigue was clearly an issue. Let it Be is definitely their weakest album. I think they were just massively distracted with other things when making it...Yoko/Linda. Add on the fact that it was their only album not produced by George Martin (the REAL fifth Beatle, in my opinion) and it was doomed to be substandard. However, i recall one rock critic who said that while Let it Be is the Beatles weakest album, it's still better than the best work of most other bands.