It might end up as a U-shape, I think the parent's assessment of the world's bottom 10% may be accurate.

Billionaires will be (are, I suppose?) enthusiastic about a world in which labor has little leverage.

Labor that will have its leverage and standard of living threatened by AI (white-collar labor for now, plausibly blue-collar soon as robotics improve) will be much less happy. Current university students seem very concerned about the effects of AI on their job prospects, and I'd wager most current tech workers and other tuned-in white collar workers are similarly much less confident in their ability to maintain their standard of living indefinitely into the future than they were five years ago.

But white- and blue-collar labor and university students (at least in developed countries) are not anywhere near the world's bottom 10%. If you're in abject poverty with little hope of escaping it, "hand everything over to the AI" may sound like an appealing option, even if the chance of that being the outcome is small. Maybe the AI will be more magnanimous and decide to raise the floor for everyone.