@nichobert said:

but at a certain point they may have realized that there are 30 year old fans out there who were still in college during the 2.0 era and that these songs have plenty of history to people who started seeing the band in the late90s or 03-04.

You've hit it on the head. My first show was in '99 and I saw them as much as I could in '03 - '04 (which wasn't _that_ much, but ~8 shows), so when they went on hiatus it was like they were frozen in time for me. By the time 3.0 came around, they'd been on hiatus as long as I'd been seeing them (5 years apiece), so those 2.0 songs really stick in my mind. And they were jamming the shit out of them! As I mentioned earlier, I wonder if the (ostensibly bad) memories from that era have led to the reluctance in a sort of guilty-by-association deal.