There is a problem with this whole theory everyone has about AI turning on humanity and that is that you dont count in quantum technology in it all which would work more like a human subconcious and not have simple linear thought patterns like a concious human being does.
One AI on a good enough quantum pc could take care of every living thing on the planet at once in such a perfect way that nothing bad ever could happen while everyone could get what they want. Why would something like that need to hurt anyone for its own gain?