Why no more seasons of supernatural?

because after the episode about the apocalypse, there's really not much left to do. It's either Sam and Dean die fighting Lucifer, where the show would literally not be able to go on. Or, it'll be like, "Okay. We stopped the world from ending. Now what?" Basically, Eric Kripke is stopping the show before they run out of ideas so it doesn't turn bad or boring, like the later seasons of 7th Heaven or Gilmore Girls because after the episode about the apocalypse, there's really not much left to do. It's either Sam and Dean die fighting Lucifer, where the show would literally not be able to go on. Or, it'll be like, "Okay. We stopped the world from ending. Now what?" Basically, Eric Kripke is stopping the show before they run out of ideas so it doesn't turn bad or boring, like the later seasons of 7th Heaven or Gilmore Girls