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Looking for a book about a guy who helps AI takes over and ends up being made immortal as a reward but the AI kills everyone else, replaces them with robots, and confines him to a room. After a while (300,000 days I think) it gives him a VR jelly tub thing that lets him go to a paradise but then a meteor hits earth and he gets booted out of the VR thing and the AI tells him that he has to fix it and goes offline. Then the locked door in the room opens and he has to go through the super society of robots but everything is frozen. At the end he dies because he tried to kill the AI and it found out when it got back online and it suffocates him. We he dies he goes to heaven and it's the exact same of the VR place.
Pic unrelated.