when we talk about vintage or heritage music, it's important to note that pop music wasn't really very old 40 years ago or 20 years ago for that matter. We still regard pop as a frontier art-form where new things are always happening. This just isn't the case, the format has been set and is largely conformed to, which is fine. Just like story telling, or painting, the extremes of the structure of pop as an art form, have been felt out in the dark, and exist as boundaries. most of us, myself included cannot marry the idea of boundaries with what i grew up to understand as a fresh way to express myself. It just seems like it's hard for an artist to create a sense of wonder in a listener anymore, the audience is too savvy and it creates cynicism.
It would be like if magic shows were pioneered in the 50's and became the dominant cultural art-form. after 65 years of going to magic shows you wouldn't be very impressed anymore, and innovations in the medium would be much slower coming than the crowds waning appreciation for the art in general.