Some very good points. My question is, Who gets to define what “serious” music is? I listen to a lot of art-rock, progressive rock, whatever you wanna call it. Bands like Happy the Man, Gentle Giant, King Crimson, Synergy, etc., IMO did music that’s way more serious than Phillip Glass. It’s more complex harmonically and rhythmically; they just happen to use instruments that aren’t part of the traditional orchestra.
I saw a biography of Miles Davis the other night (which was great, BTW, despite their short shrift of the Evans/Coltrane/Adderly era). The one thing that kept coming through in all their interviews was how serious Miles took the music, and how he wanted to make sure his music kept evolving. When you listen to something such as Bitches Brew, it initially sounds like uncontrolled chaos. But the more you listen to it, the more remarkable it is that Miles could assemble a group that sometimes numbered up to 20, give them probably a bear-bones outline of what they’re supposed to do, and make music out of it, in pieces up to 30-minutes long. Serious, creative, enjoyable to people with certain twisted personalities (such as myself). I think it’s absolute genius, and that Miles ought to be remembered with other great minds of 20th-century music.
And, regarding the lack of evolution in serious music. In the Classical era, orchestras grew to the point that conductors were required. It was said then that music would have to become uniform, and that there was no room left for interpretation. Geez, you hear someone do a Mozart symphony these days, and they can’t even agree on the tuning, nevermind the tempo, crescendos, etc.
The one thing that does frost my ass these days, though, is the treatment of the cadenza, the couple of minutes in a concerto in which the soloist is supposed to spontaneously improvise. Most of the younger soloists are playing “written cadenzas,” that they didn’t even write. I dunno if they’re not given any instruction, whether spontaneity is being discouraged or what, but I think it’s cheating.