Is the horror genre dead?

It has a lot of similar kind of problems in a lot of other genres in that it relies too much on remakes and sequels. Original ideas meant to reinvent the genre are often hard to find.

The type of horror movies that I grew up with in the '80s are long gone. They were low or mid budget yet they looked just as good as high budget movies because they used the same 35mm film, cameras, and lenses as high budget movies. In fact, some of the best looking Blu-ray transfers of all time are low or mid budget horror movies from the '80s (IMO), such as A Nightmare on Elm Street (1984), Christine (1983), and The Terminator (1984). Plus, even some of the really low budget ones (such as Friday the 13th [1980]) got a theatrical release and were very successful. Speaking of which, the Paramount Pictures Friday the 13th series Blu-rays look great too, with the exception of part 3, because that one was shot as a 3D movie, which cut the available resolution of each frame of film in half because they had to fit a stereoscopic pair of images on each frame instead of just one image per frame.

Not dead , but only a few gems in a sea of crap.
Hereditary, Kill List and It Follows were great

For what it’s worth I think there were just as many average to poor horror movies made in the 80s. Possibly more. A quick scan through Amazon Prime shows a tonne of forgotten crap horror from that period.

Some of my favorites from the last decade are

Train to Busan (2016)
The Autopsy of Jane Doe (2016)
Starry Eyes (2014)
Oculus (2013)