There's a quote from Miles' autobiography that goes like so: "Back in bebop, everybody used to play real fast. But I didn't ever like playing a bunch of scales and shit. I always tried to play the most important notes in the chord, to break it up. I used to hear all them musicians playing all them scales and notes and never nothing you could remember." His playing on this song exemplifies that approach and, to me, demonstrates why it's so effective.