So what’s wrong with prologues?

So what’s wrong with prologues? I’ve read recently that prologues are in someway wrong (or perhaps old-fashioned?) I don’t know who decides these things but prologues are very much alive and well and used in many top writers’ novels, including the bestselling ‘The Secret History’ and ‘Game of Thrones’.

Prologues are often essential tools for supplying back story, tone and hints of what is to come. I often judge a book on the prologue because it gives me an insight to the story’s content, as we...