I know the Simpsons has been on forever and there is about a decade of it I haven't seen but it was not always a low brow show (assuming it is one now). The Simpsons was brilliant comedic social commentary for 5-8 years starting around season 3/4. I wouldn't call the golden years of the Simpsons low brow at all. And I don't have any issues with low brow, I just don't think it's an accurate description of the comedic work I think of when I think of the Simpsons.