Because your local affiliate stopped airing them, it's really that simple.
They're still there. Perhaps in the area you live they have stopped, but The Simpsons are still airing in daily (M-F) syndication around the country.
Teletubbies production ended in 2000, with the last episode airing in 2001.
Daily Syndication [1993] Cable Syndication [2014]
Bleach is currently airing and it is all the way at episode 405 you can watch them either by buying the volumes or watching online.
FOX
The TV show Pacific Blue last aired on U.S. television in March 2000. Airing throughout its run on the USA Network, it began in 1996 and lasted four season.
they wont
More FOX5 - 2011 was released on: USA: 11 November 2011
Teletubbies production ended in 2000, with the last episode airing in 2001.
Uhhh, No. There's no evidence to suggest that Rupert Murdoch would resign if The Simpsons ceases production.
The cast of More FOX5 - 2011 includes: Shakira as herself Anand Bhatt as himself
Yes.
navy
It stopped airing because the show was not getting enough viewers. I loved that show too and I can't believe it stopped airing. Hope this helps.
February
The Simpsons
That's So Raven stopped airing on November 10th, 2007.
Daily Syndication [1993] Cable Syndication [2014]