> If changing the laws of the universe is fine, then nothing gets excluded even Harry Potter.

Greg Egan's law changes are on the level of "I consulted with a bunch of theoretical physics professors and asked them what the implication of tweaking this one fundamental constant would be, then I spent years meticulously crafting a world that takes into account those implications, and I had others physics professors check over my work to make sure it was within the bounds of actuality, and then I wrote a story about characters in this new world."

> Asking questions like what does AGI look like when they can’t just magically solve all issues can be fun.

Greg Egan actually has a great book about this! Permutation City. CPU cycles aren't unlimited, and there are tons of ethical problems being confronted with the entire "simulate a person" thing.