This is the only episode in which Norm enters the bar and is not greeted with a chorus of, "Norm!"
Frasier obviously got over his aversion to dealing with the arrangements for his death, as he enthusiastically made all the plans in the Frasier episode Death Becomes Him (1995).
The flash-forward ending, set many years in the future, makes this the last "Cheers" episode from the standpoint of chronology.