I think it takes an active effort to discover newer music as we get older, for many reasons. Here are some:

https://www.google.com/search?q=why+old+people+don%27t+listen+to+newer+music&rlz=1C1CHBF_enUS705US705&oq=why+old+people+don%27t+listen+to+newer+music&aqs=chrome..69i57.8347j0j7&sourceid=chrome&ie=UTF-8

I find Quora and incredibly interesting website to read - just thoughtful people sharing thoughtful answers - they're first in the hits above.

https://www.quora.com/Why-do-most-old-people-dislike-present-day-songs-and-mostly-listen-to-old-music