In 2009, The Simpsons smoked Gunsmoke to become the longest-running primetime program in television history, and it shows no signs of stopping. The show has become such an intrinsic part of popular culture that we won’t insult you by describing the premise. But we will say that the yellow-skinned inhabitants of Springfield, USA have been on the air since 1987, when “The Simpsons” first appeared in short segments on