Because you never really know what you've got until it's gone.
30 Rock never occupied a revered spot or iconic designation the way other major comedies like The Office or Seinfeld did. That may change now, as critics and the bloggers look back on its 7 seasons favorably and wonder why we didn't celebrate it more while it was still on-going. We all enjoyed it a lot, it definitely had its following, but we took its lunacy for granted. It was a such a circus of a show, tightly loaded from end to end with silliness, that we didn't see the serious worth in it. Neither did the show itself. It was always characterized as a good time, but rarely "important."
I'll miss it as a unique comedic vessel. Without any hint of overarching drama or emotional cores, it was often the home of television's purest absurdity. It was a playground where nothing could be so serious that it didn't warrant parody including, and this is important, itself. A lot of comedy has the mission of making fun of "everything," but that often comes off as an elitist condescension. 30 Rock never felt like it was above the things it was skewering. It was honest and self-deprecating, so that when it would make fun of outrage or controversy, it wasn't looking down on it with disgust. We were in this big stupid muck of life and the media together. It was "Look at us!" not "Look at them!"