The amplified electric guitar (developed by Les Paul, whose music I loved) turned every lamebrained pothead into a "musician" who didn't know music. Rock and roll was the end of the American Songbook and the end of the beauty of melody and harmony that enriched our lives. "Sex, Drugs and Rock and Roll" should be on our country's epitaph, if it is ever written.
That had to be back in the middle 1950’s.