The WatchMojo.com team are obviously a bunch of youngsters. In these lists, they rarely show anything before 1990.
Of course before 1990 you didn’t have much in the way of serialized TV, it was episodic. And the end of an episodic show is different, there’s no hanging plot threads to tie down, those are pretty much just taking a bow, usually to a greatly reduced audience.
I would add MST3K lol