[drchiu]

Purely anecdotal, but as a Simpsons fans many years ago (and not really following the show anymore), I think there are many of us who grew up with the Simpsons who simply don't have the time (as we've gotten older and have other chores and priorities to take care of first) to follow the show anymore.

[nathcun]

I still watch the old episodes on an almost daily basis, so I don't know if that's true for everyone.

[daneyh]

not a time issue...the show just became not funny and kinda lame. I pinpoint it ~5 years before the movie came out.