I don't know. The show ended in '98. Imagine how funny it'd have been if they kept going another 3 years? They'd be able to do a 9/11 episode.
George and Jerry would be at the diner talking about it.
Jerry: "They hit the towers?"
George: "They hit the towers!"
Jerry: "They really did hit the towers?"
George: "Well, they sure as hell didn't get to where they were goin'!"
And then Kramer runs in and screams about how the entire middle east should be nuked.