Lincoln:
But did she break (or subdue) John Lennon? He never seemed to have the creative genius he showed before, and I had the impression, (rather like Robert Graves and Laura Ridings) that she persuaded him she was a greater artist than him
Many of the sixties bands and songwriters had a glorious heyday in their youth, and never produced much of note after they had passed thirty.
The raw energy of the Beatles, Stones, Who, Cream and the other British bands of the sixties was by and large a transient phenomenon, only repeated by the Punk era.