I find this very interesting, as my path is nearly identical, with the added note (like some other replies) that I just can not stand 60s-70s rock any longer... but I find my musical interests are much wider, and I am listening to more new music than ever before (trance, IDM, experimental, jazz, classical).

I do know people who turn on some streaming service and basically listen to the same genre all day long. I am not sure how they do it. Maybe we are in some small demographic that goes nuts if we do not discover new music?