I'm not sure that's so, but perhaps it depends what you mean by "classic era jazz". I have only about a hundred albums by Swing era musicians and big bands and a couple of dozen by New Orleans bands. This is an area fertile for delightful exploration. I suspect many people on the board are in a similar position.
And, as you say, that's limiting consideration to jazz. There's lots of other exciting music out there - and I know you like House. Where do you go to get your insights into fresh stuff? Discos?
MG
For me, insights into fresh stuff comes from 1) jazz radio 2) board members' info 3) jazz blogs. Perhaps House fans have equivalents.