Streaming data paints a different picture of Beatles fandom today. While Lennon and McCartney defined the band’s legacy, songs by George Harrison and unexpected outliers have climbed to the top.

These renditions show another side to the act you've known for all these years.

But dig a little deeper, and the fractures breaking the Fab Four apart become more apparent. The band’s reactions and recollections in later interviews shone a light on the dissonance that was slowly ...