Basically Norman Lear wanted the Jeffersons to make it on their own without any help from their old neighbors. But that still doesnt explain why they could visit in 1978 or 1979,

San Antonio Star, Feb 23, 1975

And I thought you were going to say because it was not a spin off :lol:

And I thought you were going to say because it was not a spin off :lol:

Honestly it wouldnt have made sense for Archie because if he didnt visit them at their house in Queens why would he traveled all the way to Manhattan to see them? Maybe Edith would make sense and since she wouldnt be traveling without Archie it was no point in doing the crossover.