It's certainly not as great as it once was, but it's still a good, consistently funny show. I don't keep up with it regularly, but whenever I happen to catch a more recent episode it always ends up being fun to watch.
The show first started airing in 1989, the year I was born. When I was a kid, it was the show that my parents stipulated my brothers and I weren't allowed to watch, and so it became one of my favorite shows and sneaking a viewing of it whenever I could was constantly one of my top priorities. When I graduated high school in 2007, The Simpsons Movie hit theaters just a couple of months later. I really can't imagine a world where The Simpsons isn't still going, and the day that it gets canceled is going to be a very sad day indeed. Long live The Simpsons!