At the end of Golden Girls (and it was obvious that Bea wasn't coming back), it was a final fairwell.
However, Dorothy had money, her new husband was loaded...in real life people in that situation, wouldn't they have visited once or twice a year
and wouldn't they have kept in constant phone (now they could Skype
almost every day?
While it made for a sad farewell, I don't think it rang true.
(same with when Mike and Gloria left for California and Archie and Edith felt they would never in their lifetime see them or their granddaughter again.