Never Knew Cocaine to Improve Anything
I listened in the studio control room as musicians' modes of consciousness-alteration proceeded from grass, hash and acid to heroin and cocaine by the 1970s. All but the latter could, on occasion, provide benefits, at least to the music. I never knew cocaine to improve anything…. I suspect that the surge in cocaine's popularity explains – at least in part – why so many great sixties artists made such bad records in the following decade.
— Joe Boyd, 2006
From the book White Bicycles: Making Music in the 1960s