I would say that lots of my jazz records that I bought first were from 70’s jazz, music that somewhat sounded (to me anyway at the time) like ’rock’ music of that era. As I have continued to listen jazz, I started more and more to appreciate ’older’ stuff, first from 60’s and than to 50’s and still I have not returned to that 70’s jazz sound.
I have a different experience.
I also came to jazz through the fusion of the 70’s (Mahavishnu, RtF, Iceberg, Gong, etc, etc), and then began to appreciate jazz from the 60’s. But not too much from the 50’s. Post-bop. modal, avant-garde are my main interests in pre 70’s jazz.
But most of my taste in jazz, is from the 70’s forward, up through the present. So many contemporary jazz musicians suffer in relative obscurity, that IMO, rival some of the best from the past. And there is plenty of world class contemporary fusion, too.
I also still listen to prog. There is plenty of great, contemporary prog, much of which, is not trying to copy the sound of prog of the 70’s. But even a lot of the contemporary prog, that does have a bit of a retro feel, is still done so well, that it is still well worth listening to.