LaMonte is still kicking, but at 90 I don't think he's terribly active anymore. That said, Marshall Allen is still leading The Sun Ra Arkestra at 101--here he is, just
last night! (He still performs abroad too.)
On the bright side, I think there's always roughly the same amount of
good stuff out there, at any period in time. I'm always perplexed by people who lament that there was so much better music or whatever in the 60s/70s/80s/90s/whenever. The quality of whatever is actually popular seems to wax and wane over time, but when you look beyond what does well commercially there's an abundance of solid "content" out there. And for those who really hang on to whatever whoever was doing back in whenever, there's someone out there doing pretty much exactly the same thing today.
A reviewer once described my style as "a sort of backwoods Terry Riley" (in a review that
also referenced Deleuze completely irrespective of any direct, maybe even indirect, indicators within my notes and titles). Arguably,
Henry Flynt would be more
directly a backwoods Terry Riley, but I wasn't gonna complain.