Can you imagine how different things would be if Harry’s maternal grandparents had lived to raise him?
But I’m wondering how would the relationship between Petunia and her parents have been if they were still alive when Harry was born and after Lily was killed.
Could there have been Petunia having respect for her parents and strictly urging her to be good to Harry?
But on the subject of Snape ... what would happen if Harry’s grandparents told him about Snape at some point after Harry starts attending Hogwarts?