I'm not a crankypants*.
I'm not the fun police.
Rowling told Time: "There have been times since finishing, weak moments, when I've said: 'Yeah, all right' to the eighth novel.
"If, and it's a big if, I ever write an eighth book about the [wizarding] world, I doubt that Harry would be the central character.
"I feel I've already told his story. But these are big ifs. Let's give it 10 years."
Just say no, JKR. Just say no.