My cousin refers to music as "old" all the time. She's 14 and likes all the rap/hip hop mainstream, auto-tuned garbage. So, I put in some Immortal Technique for her one day and this was our exact conversation:
Me: "What do you think?"
Her: "It's good, but it's old."
Her: "Well, no one else I know listens to it."
Me: "Why does that matter?"
Her: "Because it just does."
People like us don't get it, but I guess when you're in high school and want to fit in with the crowds, listening to music that is currently in and popular is very important. When I was in high school, I could not care less what was popular and "in" at the time, I listened to whatever I thought was good and I assume most people here felt the same way.