I get where you're coming from, but I have to say for me it's the complete opposite. I've had more than 20 years to listen to my favorites, and while I still do, there are few better feelings than when I discover a new band or artist that sparks that excitement that pretty much only music can set off inside me. If it's of any importance I'm closer to 40 than 30, so by someone's standards I'm probably already ancient, but seeing as how listening to good tunes has a rejuvenating effect, I don't feel a day over 18!
I've noticed that I Shazam stuff about daily while watching TV and films for example. There's always music playing, and when something catches my ear it's nice to be able to identify it instantly and get to know the artist better.