There is always the option of all-out war on AI, which won't be triggered until it is "almost" or "definitely" too late, and only because all other options have failed. Maybe the aftermath won't be an exterminator or matrix type dystopia, maybe we will win by the simple resource of setting back civilization to a point where we can't produce AI hardware any longer. Of course we would need to keep our entire civilization there by sheer stubbornness (you can ask any third-world country for a recipe for eternal non-progress. Yes, ask Cuba) . But that "mild" scenario, no matter how many how lovely it might seem to people who want to experience the middle ages again, is terrifying to me. Somehow, I'm not very optimistic about our future.