I've noticed that a number of my friends from high school and college jump at the chance to see bands that they loved back in the day. I certainly can't blame anyone for that. As a teenager, I just didn't get the "adults" hanging on to classic rock (which in retrospect is terrifying, because that music at the time was no older than, say, Nirvana's Nevermind is now). But something weird happened when I got older. I abandoned most of the growing up music.
OK, so maybe "abandoned" is a strong word. Let's put it this way: I tend to listen to new stuff most of the time. For years I've made yearly playlists, compilations of stuff that I'm into, and I use those as a jumping off point to listen to various albums that those songs are from. When I'm at my desk, or taking a walk, I'll hit those lists most of the time, and go back maybe a year or two. I unfairly avoid 2012, because it reminds me of going back to Cleveland from Seattle and I still can't let that go. The lists also act as soundtracks to my life, apparently.
What I don't do is think, "Gosh, I really need to listen to Def Leppard." That was my favorite band in high school, though I was no stranger to Depeche Mode and Tears for Fears at the time. In fact, high school music in general is something I just kind of find cringeworthy now. Maybe once a year, I get a little fit of nostalgia, but it never lasts very long. I do have a stronger opinion about a lot of music from the 80's, but that '88 to '91 era didn't have much going for it.
Stuff from college, and the late 90's, still creeps into my head some of the time, and I still like it even if I don't actively listen to it. The grunge/alt rock thing resulted in a lot of fun and excellent stuff. A few bands have managed to keep going even today. I have playlists from those years, which at the time were things called "mix tapes." I had a really nice tape deck.
Still, my daily routine is mostly current stuff, and I don't know why that is. I resisted change so much in my early adulthood, and now I need certain kinds of it to be continuous, including the music. I realize that this is atypical of people my age.