> From a pessimistic perspective, you could think of reasons why a misaligned AI keeps humans alive. Does it simply enslave humans and use us for our fine-manipulation capabilities until it can get proper robotics up and running? Does it want to observe us scientifically? Does it want to use captive humans as bargaining chips with other civilizations as it expands through the galaxy? Or does it have some sort of quasi-religious respect for humans, e.g. reasoning that keeping us on a reservation of some kind reduces the risk that a simulator-god pulls the plug on the universe?

Or another: it just ignores us, but keeps the good resources to itself. There's still humanity, but it's brutish and primitive, regressed to the stone age, and pushed to the margins.