How to know when your music taste is getting old

Ok, so my music taste may not exactly be broad, but I suddenly just realized how precarious the small list of bands I actually like is. The phenomena that has brought this about is that almost every band in my favorites list has just realized a "greatest hits" or rarities album.
It all started with Static-x (Beneath Between Beyond) releasing one a few months back and now both Ministry (Early Trax and Side Trax) and Marilyn Manson (Lest we Forget) have one arriving in the next few weeks. While this of course doesn't mean that these bands are winding up it does remind me of how long they have been around.

It's an interesting concept that in these days of music swapping on the internet there are still enough loyal fans to consistently snap up this kind of albums, but I guess there is still a few other out there that also subscribe to the if I listen to it enough I should buy it theory.

So I've been hunting around for a few new groups to listen to, but so far I'm not having much luck, in fact even cdnow.com is recommending I look at buying Opiate by Tool from 1992 !!!

Fortunately the Big Day Out Lineup has just been announced and SOAD are there along with the Beasty Boys which is enough to convince me to buy a ticket so hopefully I'll find a few local acts to my liking on some of the smaller stages.