I loved The NeverEnding Story when I was a kid, but it feels like something similar could be done in any era. Bill and Ted, OTOH, seems like something that would've only happened in the 80's. Although, there's Dude, Where's My Car? which happened in 2000, so maybe I'm wrong on that. But Bill and Ted utilized the two nitwits trope, but then combined it with time travel. So I come back to thinking, "This only happens in the 80's."