I respectfully disagree. Functionalism isn't really the ultimate value: our world would look different if it was. The ultimate value is instead rather circular

I respectfully disagree. Functionalism isn't really the ultimate value: our world would look different if it was. The ultimate value is instead rather circular: how much something is worth, is how much you can make people think it's worth. As we head towards general AI, we can generalize this: how valuable something is depends on how much people and AIs/systems think it's worth. Whether it improves anything at all, is very much optional.