Recently watched both Night of the Living Dead movies (original/remake) back to back with a loved one. I appreciated the slowness. It changes the horror so that it comes from the dawning reality of the zombie's existence, and the fear of facing death of family or lovers, and of course, body horror.

Fast zombies turn it into a "how long can I hold my breath while the character is underwater" type horror. How fast can I run? Oh heck there's no way I'd run that fast for that long!

The latter is not my preferred type of horror. I don't compete with (relate enough to?) characters as they go through those physical challenges. I relate to the cerebral horror of a situation.