Te way that you phrased the question makes it seem as if you mean literally getting old like an old person crippling. I don't think that Toribash is getting old because as Wolfe said, they are constantly updating it and adding in new features to keep it alive such as the new hair colors, buddy lists, replay abilities, etc. The devs are doing whatever they can to keep it "fresh". So no it is not getting old, the only way I could see how it is getting old is if it was getting a little bit boring to the long time player.