One advantage that an animated TV show has is that its stars need never age. Case in point is Matt Groening's creation The Simpsons, which debuted on Fox TV way back in December 1989 (although it appeared in a shorter and rougher form two years previously as a skit on the Tracey Ullman Show) and whose stars haven't aged a bit in the years that it has been on consistently since.
However the show has gone through many changes behind the scenes with various creative contributors, especially writers, coming and going -- prompting some critics to say that it is not the same Simpsons that it once was.
Personally I think it is still a great show, although I don't rush home to watch it the moment it first airs as I once did. But I still really enjoy it whenever I catch an episode (some more than others). And one episode that I got to watch recently was the Sadgasm episode, from the ongoing 19th season, in which Homer flashes back to the nineties -- a time when he creates grunge, or so the storyline goes.
I thought it was hilarious and loved it. (Check out the highlights of it in above video clip if you haven't already seen it.) But some naysayers were critical of it: saying things like "Hey, how come Bart wasn't born in this episode when he was already born when the series started the previous decade?" To whom I say: It's a cartoon, dummy! And it's called suspending your beliefs as the show takes poetic license.