> ownership is literally the _only_ job that will never be replaced

Humans will always be the roots of the ownership graph, but I think AI can be any other node. Start an AI-first hedge fund or private equity firm. The AI makes the decisions. There may be a human manager, but they've agreed to be the AI's arms and ears. AI starts looking like a root owner if/when it starts managing a large charitable endowment, however.

Same thing with managers, particularly CEOs. The board may become dissatisfied with the present CEO, and start requiring that they run all decisions past an AI. The board agrees to certain values or priorities for the AI. Eventually, the AI is the one effectively in control, and the CEO is just a vestigial organ drawing a salary in case the AI ever makes a very bad decision.