'I know there are groups at the top of the charts that are hailed as the saviours of rock'n'roll and all that, but they are amateurs. They don't know where the music comes from,' he wrote, adding, “I wouldn't even think about playing music if I was born in these times... I'd probably turn to something like mathematics. That would interest me. Architecture would interest me. Something like that.'There are those who make the same point about some of today's JM performers.