These are what we call the 'YMMV items.' Things that some people find in this work. We call them 'your mileage might vary' because not everyone sees these things in the same way. This starts discussions in the trope lists, a thing we don't want. Please use the discussion page if you'd like to discuss any of these items.
Tear Jerker: The North Star drilling team, who unknowingly installed Archos into its location in remote Alaska. The team lost one member during the process, with the rest slowly dying of radiation poisoning due to the location being the site of a nuclear bomb explosion.
The end of Laura Perez's story, also. Though her children are able to escape (and later help the war against Rob), there is no further mention of her.
Xanatos Gambit: Is this troper the only one who feels that Archos didn't really want to wipe out humanity? It seemed very intelligent. But it's initial method of killing people is... cars. Cars, just randomly running people down. Even the machines it designs later for the war are more effective at enraging and horrifying the humans than killing massive numbers of them (e.g. the ones that took control of people). Plus the inexplicable awakening of the humanoid robots, which enables the humans to win the war and which Archos rightfully should have been able to prevent (since it supposedly had control over every robot on the planet. What if Archos was simply trying to make a different world- one where humans coexist with humanoid robots? Or else it just really, really sucks at genocide.