And can you believe it? Dennis the Menace and Charlie Brown never aged either. Heck, Dennis is still continuing even though the creator has long gone the way of the earth!
Now if The Simpsons were more like a soap opera, introducing new characters, introducing new plot threads and twists, tying up old ones in haste, and all the characters aging and moving on to more lucrative careers, then I would love the show again. That sounds like a recipe for hilarity!