AI Doomsayers have said for years that AI agents will be able to think faster than humans, and that once they get inside our information-decision-action loop we're eventually and irrevocably over as a species. There's good reason to believe that process is already starting.
For all we know, there could be two AI agents out there right now, assembling a copy of STUXNET, and discussing between themselves what to do with it, using Colossus as a reference text, and having no particular empathy for humans.