I just noticed that Are vampires and werewolves on-topic? is closed as a duplicate of Should we include folklore?. A comment below points out that if folklore is going to be on-topic, then vampires and werewolves are going to be included automatically.
But vampires and werewolves have a lot of new stories today.
Assuming folklore, and with it vampires and werewolves, is going to be included on this site - then where do we draw the line?
When are posts about vampires and werewolves on-topic, and when should they be migrated to Science Fiction & Fantasy ?