Do it, Fox. Do it now.

Cancel it. You know you want to. It will be prohibitively expensive to get different voice actors to do Mr. Burns, Smithers, Ned Flanders, and Principle Skinner among dozens of others. Go out on top while the show is currently killing it and back to Golden Years standards. Then do another Simpsons Movie (which Harry Shearer is already contracted for) to wrap things up.

Harry Shearer just gave the show an excellent excuse to go out on top. Take it.