>there was nothing uniquely 70s about that movie... with
>slight changes it could have been made about the 80s 90s and
>2000s because it just tapped into timeless youthful angst.

You can argue that there's nothing uniquely 70's about it but there's also absolutely nothing uniquely Gen X about it either. If a movie could have been ANY decade, why would you call it be considered a Gen X movie? Shouldn't a Gen X movie be definitively based in that generation?