30 Rock ends tonight, after seven seasons on NBC, with little of the fanfare that surrounds a grand television event. Instead, it feels as if the show has already slid into the semi-obscurity of syndication. The critics would rather talk about Parks and Recreation and Girls; the Internet hive mind is swarming over Community and Louie; the awards shows have switched their allegiance to Modern Family. And the American viewing public? Well, it never liked 30 Rock all that much in the first place. At its peak, in its third season, it was the 69th most popular prime-time series in the country.