Ecto-2009;149992
Only the special effects were outdated and the haircuts and the music. Not the story.
How is the story not dated? It's not like the whole end of the world thing was anything new at the time. In fact the idea of Ghostbusting wasn't exactly new either *cough*, but it was presented in an interesting way. But the idea of Ghostbusters is quiet dated. That doesn't mean it's bad though.