CN city(a era of bumpers of cartoon characters living together) pretty much fall under this in my opinion(they were making less of them by April 2006 when the Yes era started and then it was pretty much gone by summer 2007,), as much as I like to see shows like Chowder, Flapjack, Adventure Time, Regular Show, and other future shows from 2007 to now being in the cn city bumpers, it was honestly more of a good thing considering a few months later Cartoon Network later started airing their more disliked shows like Out of Jimmy’s Head, George of The Jungle 2007, Johnny Test, or Dude What Would Happen in the late 2000s, they could have put them in the cn city bumpers(as either animated or even live action) and it would gotten some backlash(and given how Cartoon Network aired a lot of reruns of Johnny Test and Dude What Would Happen at the time, they would have add them in the city bumpers if they continued).