I don't know -- I can picture some people loving The Birth of the Cool, but disliking/not "getting" Kinda Blue (thanks, Troy, going to have to use that from now on). So I'd have to disagree even with that overgeneralization. There is a large contingent of old school boppers who don't "get" this modern jazz (read: Miles Davis Quintet I and beyond). And they're not necessarily octogenarians.