Miles had a lot to say about those purists especially Wynton in his '89 autobiography. He slammed Wynton Marsalis for talkin bad about his own brother for workin with hip-hop artists and he was mad that they wouldn't consider the music of cats like Bird, Coltrane, Diz, and Louis Armstrong, "classical" music. As if it wasn't good enough or maybe a bit too "black" to earn the same respect as Beethoven, Bach, and Mozart.