I don't understand myself, what you actually gain from constantly buying new music. Either the music is good, or it's not. If it's not it's not a loss to not buy it, and if it is it's not going to stop invoking the emotions you like it for, or intellectually demand you. You can hear the same music for hundred of times and still discover some new aspect, instrument, melody or sound, you haven't noticed yet. (if it is good)

If I would try to chase, constantly, new music, I wouldn't be able to actually listen to anything, and thus wouldn't enjoy anything at all.

(The only thing that makes sense to me, if people want to be like their peers and up to trends, so simply "listen" to new music to be able to talk like they now what's en vogue right now. But then it's hardly about the music itself and more like collecting an evergrowing checklist.)