One of the joys of the horror genre is in the way it revels in its various subgenres. In other words, not every horror movie is looking to be a trailblazer, as most are content to be a good example of its chosen subgenre, whether it's a haunted house movie, a slasher, or so on. Subgenres also tend to have a heyday, a period where they're trendy, and everyone is trying their hand at it. Because of this, it's easy to declare a subgenre dead or washed up prematurely, for while trends certainly die out, a decent subgenre — especially in horror — never truly dies.
It's no surprise that the found footage subgenre rose to prominence around the same time that smartphones began to transform how people communicated. Once the idea of people constantly filming themselves and others stopped being a

Slash Film

The Baltimore Sun
Detroit News
CNN
Rolling Stone
Vanity Fair
What's on Netflix
The Hollywood Reporter
PBS NewsHour Politics