My wife and I rewatched X-Files start to finish a couple years ago. It still holds up. The monster-of-the-week where Mulder sings the "Shaft" theme song is still hilarious.

But in retrospect, I wish we hadn't all collectively decided to winkingly go along with conspiracy theories. While crackpots will always exist, I think a lot of people took this and other shows too literally. Yes, conspiracies exist. But no, most of the time, the guy at the metal desk in the grey government office is just doing what his job description says he's suppose to be doing.

I don't know that X-Files directly led to idiocy like antivaxxers and climate change denial and election truthers. I do think it gave a lot of people social cover to start exploring those dumb ideas, and no one took them seriously until it was too late.