Change is considered an almost essential feature now but it’s not long ago that it was considered undesirable, maybe even impure. Bob Dylan picking up an electric guitar or The Beatles moving into psychedelia are seen as pivotal innovations now but were utterly derided from certain quarters at the time. It’s worth keeping in mind that Keith Richards only recently called Sgt. Pepper’s… “rubbish” (a fact which illustrates, your own feelings about Mr. Richards aside, he’s one of the all-time bad guys in music. It’s not hard to imagine him living with Mike Love in a dormant volcano in the shape…