The truth is there are SO MANY great episodes of The Simpsons. Even the current seasons have a lot to offer.
I also think that the earlier seasons get an advantage because they’re the episodes we’ve all seen dozens of times.
Obviously I won’t deny that the earlier seasons have 10/10 episodes. Maybe there are fewer 10/10 as you go along, but even a “bad” episode will have some great jokes in it.
In fact the “I’m a sign, not a cop” meme/macro, that’s a season 20 episode.
Diablo 2 also had an expansion… and balance patches… But I agree.