When should have The Simpsons been cancelled?

[Veknoid_Outcast]

Interesting question. I'd say at the conclusion of season 8. The quality began to dip noticeably after that.

For those eight seasons, especially during seasons 4, 5, and 6, the show really was on top of the world. It's a shame it's gone on for so long. Years of mediocrity have tarnished its reputation somewhat.