"All in the Family" is a valid show. In fact is a great show. It may be crass, sarcastic, and bigoted, but these are many of the things in life that we find funny. The show exposed many of the things that were wrong with certain parts of society and made them funny. Without this show we would not have had "The Jeffersons".
I personally have never really liked the show All in the Family because it is boring, unrealistic, and unhumerous. I do not think its a valid show. It apparently is getting a reboot, but I do not think it is a good idea in this time of age because no one really cares about it.