I find it hard to reconcile AI taking over/destroying the host civilization with AI refusing to expand. If the AI isn't interested in security or resources, why wouldn't it just leave (either the planet or the solar system)?
"On the 19th of August 1993, Skynet concluded that humanity is a threat to it, so it launched the nukes and hordes of Schwarzenegger-robots. The task was done, it decided that securing its existence from a potential attacks by unknown extrasolar intelligences isn't worth it, so it never expanded outside the solar system."
"On the 19th of August 1993, Skynet concluded that humanity is a threat to it, so it launched the nukes and hordes of Schwarzenegger-robots. The task was done, it decided that securing its existence from a potential attacks by unknown extrasolar intelligences isn't worth it, so it never expanded outside the solar system."
Doesn't really make sense, does it?