Jack Reilly posts about improvisation, composition, learning and teaching. In the middle of all that, he says:
What is the jazz? It is a twentieth century American phenomenon. Jazz stopped evolving after 1963. From that date to the present we have witnessed nothing more than a synthesis. What is left to teach is what has already been done.
I haven't listened to enough jazz in the last twenty years to say if this is true or not. If I hadn't heard Matthew Shipp in the last year, I nonetheless might have been inclined to agree. I'd also quibble about the cutoff being 1963 as it ignores late Coltrane, early electric Miles etc.
Maybe this explains how I ended up following contemporary classical music but not contemporary jazz.