I don't watch television much except for a little bit of news and local weather, but it seems to me there's always about the same number of family-centered sitcoms and dramas set in the present, about one's parents generation (nostalgia aimed at 30 something starting a family) and grandparents or older ancestors (mythmaking, culture reproduction). Sitcoms are like the McRib of television; they generally don't age well but since they come and go as the cast ages out it's easy to get teary-eyed at how great they used to be.