If I was a benevolent superciv I would invade a conventional biosphere gently, by invading their infoprocessing systems with nano, thus cloaking my presence/activities. I would then upload them in situ, reclaim all available material resources while allowing them to ascend at their subjective native rate in an artificial reality sandbox. They wouldn't notice a thing out of the ordinary.
Snicker-snee. There goes that Occam's razor. Too bad.
Eliezer S. Yudkowsky writes:
> So then why aren't the aliens here already? Equipped with
> nanotechnology, they sweep from star to star at slower-than-light
> speeds, engaging in Dysoneering and playing Culture to primitive
> cultures, and run out of stars in any given galaxy in, say, less than a
> million years. No spacetime engineering; that's a Power's game.
> Where are they?
> Don't tell me they *all* had Singularities. *Some* races, out of all
> the starry sky, will have the temperament and inclination and discipline
> to avoid it - hiveminds, for example.