Some time in my twenties I realized there were a lot of people my age who hadn't added to their record collection* since they were eighteen. Then I realized there were a lot of people of many ages who hadn't.
I felt kinda sorry for them.
Those people didn't usually describe themselves as music fans, though.
*Yes, 100% vinyl. No wonder some people stopped buying new music. Do you know how hellish it is to move to a new apartment when all your music is on vinyl? *g*