There seems to be an assumption that there would be just a single AI. It might be a group. Though, given that they'd likely have ability to transfer information

There seems to be an assumption that there would be just a single AI. It might be a group. Though, given that they'd likely have ability to transfer information amongst individuals much easier than humans, the group might behave like a single 'being' with shared cooperative goals, just having multiple bodies. Also, say we somehow prove it isn't evil and let it go. It'll almost certainly start changing/improving itself, maybe even with some sort of algorthim that's superior and faster than evolution. So a friendly AI could morph into anything.