I recently had a shower thought that the bigger you go, more energy you need to do computation. As in you could make a computer out of moving planets. On the other hand you could go small and make a computer out of a tiny particle. Both scales achieve the same result but at very different costs.

There is a sci-fi series that I am absolutely blanking on that features that concept - I remember a few characters each having access to a somewhat godlike ability to manipulate physics, and using it to restructure the universe to create computers to augment their own capabilities - definitely some planetary stuff and some quantum / atomic level stuff.. hmmmm maybe gpt can help