Huge corporations and governments are kind of like hybrid silicon/meat AIs and that's exactly what they've done. I think this is the most likely outcome.
E.g. older houses were hand-built, but nowadays houses are built with straight walls and standardised heights for everything so that mass-produced furniture can fit in them. But if in the future our furniture is made on-demand by AIs, then there's no reason to do it that way; you can have a non-standard height for your kitchen counter (for example) and if/when your dishwasher breaks, the AI system will fabricate you a new non-standard dishwasher to go under it.
A Rube Goldberg machine usually accomplishes one task. Corporations at scale don’t resemble them mostly because, as there are a multitude of concurrent tasks in flight, the Rube Goldberg machines are neither complex nor absurd enough.
The majority of companies are run by people who would have trouble understanding the details of what their company does.
That means we already have AGI, right? The corporation.