“There was a time when the avant-garde seemed manageable. I don't mean to say that it's ever been inclusive. I don't even mean to say that you could listen to it. Sure, you could if you wanted to, but you'd risk being labeled "weird" or "academic" by your friends, and surely that wouldn't be worth getting exposed to a few, rare specimens of actual ingenuity. No, by manageable, I mean you knew what ”