I'm sticking a toe into a pond I'm not really that familiar with here, but off the top of my head, I'd say announcements of the Death of Jazz are a bit premature.

I'm not a jazz aficionado, but I do enjoy it as a pleasant listening diversion from folk music, classic in general, and opera, my usual listening choices. There are two radio stations within my listening area that play jazz all day long, and I often tune into one or the other of them.

In my listening area, one small station plays some "folk music" a couple hours a day (a little traditional, but mostly recent singer-songwriter stuff). I listen to a lot of the one all classical music station here, but when I've had about as much Mozart or Bach or Ravel as I can take, I switch to one of the jazz stations.

Jazz seems pretty healthy to me.

Don Firth