Several items here need forgetting: I'd propose the Reagan Presidency, the Berlin Wall, and Clinton's Impeachment for that category.
Quite a few of these items I never noticed in their prime, like Return of the Jedi and New Coke.
2036 looks to be a very good year, flushing away the memory of a grandly distorting occasion of deadly theater.
I am reminded of Issac Watt's paraphrase of Psalm 90:
I find nothing mournful in contemplating time. Time moves on.
Cartoon via Ryan Cooper at the Washington Monthly.