On May 30, 1966, the Beatles released “Paperback Writer” – a fortnight after “Paint It Black” by the Rolling Stones and only days before Bob Dylan released “I Want You” as a single. Paul Simon wrote and recorded (with Art Garfunkel) “A Hazy Shade of Winter” not long after. Yes, yes, what bliss it was in that dawn etc. But anyone predicting back then that, 60 years later, all four artists would still be releasing new music and touring to large and appreciative audiences would have been laughed clean out of the Bag O’Nails. Even when glossy monthly music magazines such as Q started appearing in the 1980s, 40 was regarded as the dark side of the moon for the foundational pop stars of the 1960s.