Which One Doesn't Belong?

Here's the list of sitcoms throughout history that have lasted for at least 10 seasons:

1. The Jack Benny Program 1950-1965
2. The Adventures of Ozzie and Harriet 1952-1966
3. My Three Sons 1960-1972
4. M*A*S*H 1972-1983
5. Cheers 1982-1993
6. Frasier 1993-2004
7. Married… with Children 1987-1997
8. The Jeffersons 1975-1985
9. Murphy Brown 1988-1998
10. Friends 1994-2004
11. Two and a Half Men

Must say, I was shocked to see this list is so short; I guess 8-9 years is where great ones hit the wall, a la Seinfeld/All in the Family/Roseanne et al. How long did Mary Tyler Moore last? It does seem as if the more bland and innocuous a show is, one of which a zillion people watch every week even though nobody can name one of them, the more likely it can can coast for years; somewhere, I bet they're still making episodes of Scrubs and The 70's Show.