Mondale's death also means that out of the three top presidential tickets in 1980 (Democratic, Republican, and Independent), Carter is the only nominee that is still alive. Carter and Dole are also the only two living nominees of 1976, although Dole has cancer and could very well be gone before this year is out. This also means that 1992 is now the earliest election in which both members of one major party's presidential ticket (Clinton and Gore) are still alive. All four major-party candidates of 1984 are now dead.
Although prior to Mondale's death, every Democratic Presidential nominee from 1976 onward was still alive. Quite a long timespan and probably has never been the case at any point in history prior.