@michaeluk26 this was my post about the BWP, but I didn't want to overload the thread lol..
Glad to see Blair Witch being mentioned. As some mentioned, what it did for the Horror genre was huge. One of the most important horror films in history. Much like Paranormal Activity after it, Blair Witch's marketing and buzz was something only a movie in the late 90's with the advent of the internet could pull off. When a horror movie can make it's audiences ask "Wait, was this real?", you nailed it.
Movies like BWP and PA have a tendency to lose their "punch" once it's revealed that it's fake. And I get that. You watch those movies now, and they for sure don't pack as much of a punch. But at the end of the day other horror movies are no more "real" than the found footage ones.