I say somewhere during/after season 10.
Season 10 had still good episodes, but it started to have really, REALLY weak ones that i found to be pretty rare before that (season 1 and 2 not included).
And then there was Season 11, wich was just god awful, with featured the "The Writers just don't care anymore" Saddlesore Galactica, the first mayor bad "retcon" in Form of the second "Simpsons in the Future" Episode (even though that wasn't nearly as bad as the later retcon with Marge and Homer suddenly being 20-somethings in the 90ies).
(And i totally agree how actual guest apperances started to be a sign of declining quality. They made sense for a while, but then they mostly started to become one-note apperances with characters saying something like "Woah, Name McFamousGuy, the famous What-the-person-does" beforehand...even the movie was plagued by it)
Although i think that no season was as bad as 11 and 12, The Simpsons never really recovered to me. And although i hear the series starts to improve recently (And i've seen "The Book Job", the first episode in a long time that i hadn't real complaints about and just enjoyed...i even enjoyed how they wrote the obligatory guest apperance of Neil Gaiman into it), i still think the Simpsons would be better off canceled.
Since they couldn't get the series to end after the movie, they should just do some kind of "All Star Season" and pretty much go and beg people like David X. Cohen, Josh Weinstein, Conan O' Brien and Brad Bird to do thier own send-offs (Not necessarily big or groundbreaking or gimmicky) to the show that, even though it ran for far to long, still counts as one of the best TV Shows of all time.
Season 10 had still good episodes, but it started to have really, REALLY weak ones that i found to be pretty rare before that (season 1 and 2 not included).
And then there was Season 11, wich was just god awful, with featured the "The Writers just don't care anymore" Saddlesore Galactica, the first mayor bad "retcon" in Form of the second "Simpsons in the Future" Episode (even though that wasn't nearly as bad as the later retcon with Marge and Homer suddenly being 20-somethings in the 90ies).
(And i totally agree how actual guest apperances started to be a sign of declining quality. They made sense for a while, but then they mostly started to become one-note apperances with characters saying something like "Woah, Name McFamousGuy, the famous What-the-person-does" beforehand...even the movie was plagued by it)
Although i think that no season was as bad as 11 and 12, The Simpsons never really recovered to me. And although i hear the series starts to improve recently (And i've seen "The Book Job", the first episode in a long time that i hadn't real complaints about and just enjoyed...i even enjoyed how they wrote the obligatory guest apperance of Neil Gaiman into it), i still think the Simpsons would be better off canceled.
Since they couldn't get the series to end after the movie, they should just do some kind of "All Star Season" and pretty much go and beg people like David X. Cohen, Josh Weinstein, Conan O' Brien and Brad Bird to do thier own send-offs (Not necessarily big or groundbreaking or gimmicky) to the show that, even though it ran for far to long, still counts as one of the best TV Shows of all time.