I've written before about how situations and characters are echoed in other shows and yet don't have to be relegated to the remake dimension because they aren't carbon copies. 'The New Addams Family' would have to be sent to that other TV dimension; all of the variations on 'Betty de Fea' (like our own 'Ugly Betty') can stay in Earth Prime-Toon. (Well, except for the cartoon version of little Betty....)
Mark Evanier has pointed out that a 1980's blipvert for Big Red chewing gum is now being mimicked in a Verizon ad. Despite the similarities, all of the little scenarios within both commercials can share the same TV dimension.
See his comparison here.
Well, I'm off to watch YouTube on a horse....