Probably having the good stages dotted throughout the race rather than all clumped together at the end after two weeks of boring stages would have helped. Also it being lavished with praise as a Tour to hold on a pedestal generated a decent amount of backlash because of the huge amount of backloading and the complete lack of action other than crashes of the first two weeks being swept under the carpet because it ended with a sequence of epic stages.
And because the next few Tours were really disappointing, it also seemed a lot better by comparison, perpetuating the discussion. After all, you're still jumping in to defend it over a decade after the fact, and I'm still jumping in to critique it over a decade after the fact. So at least it was memorable, which is more than can be said for most Tours for the rest of that decade.
Hell, I did think about posting it in this thread actually