Pop music of decades ago

To a younger person, who wasn’t alive when the music was released, it’s likely obscure.

To an older person, who was of the target age for the music at the time of release, it’s pop music.

If they both like lesser known music, they younger one may like the old pop music, while the older one hates it.

Age is just one form of perspective. Everything shifts, it’s just a matter of time.