I generally can’t be arsed with old bands (especially if they’ve got a big back catalogue) that I don’t already know and follow, even if they’re still active and releasing new albums. Generally, if they’ve stopped producing music, or if they have already previously released 3 or more albums before I “discover” them, I just lose all interest. Something about the prospect of going back through the back catalogue just puts me off, like it’d be a bit of a chore, and that I’ve missed the boat, so to speak.
So in that sense I prefer new bands, though I have no real investment in being first or even in seeing them develop. It’s purely a laziness thing, since I know I’d feel obliged to dig into the back catalogue, if I did decide to listen to (and like) an album by a well established artist that I hadn’t ever listened to previously.
Don’t care if that’s irrational or closed-minded, or it means that I’m missing out on a wealth of great music, or it makes me a hipster or NME-teeny-bopper, or whatever.