I think the culprit is the slow decay of a nomadic musical fanbase. Names have been dropped of bands that can fill arenas and sustain a fanbase, but that tends to be due to larger, more localized fanbases, as opposed to a subculture of people willing to follow bands around the country in the fashion that the GD and Phish inspired. I think it would be shortsighted to say there won't be another band that has the same amount of draw and longevity over their career, but it's going to involve a slightly different cultural niche and as many have already said, it may not appeal or make sense to us. I can think of a lot of bands that could have pulled it off, The Disco Biscuits being one. But it seems like there is so much music out there that listeners today are becoming slightly ADD, and making the kind of commitment Phish and GD fans did is going to be a little less likely as a result...