It's because the party is over. That was the economic and political atmosphere in the country for the Nineties. Tons of sh!t went down in the 90's, and even the bad stuff, (OJ, Bosnia, Clinton...), added to the festive aura. It was like everyone was winking at you all the time, fair foul and vice versa. It was a land without consequences.
Electing George W, was like admitting that it's time to go to the dentist.