AI actually is decently good at updating docs. But the kinds of problems that are being described in this thread, like documentation that varies wildly in tone

AI actually is decently good at updating docs. But the kinds of problems that are being described in this thread, like documentation that varies wildly in tone and target audience or that describes different versions of the same service, or where how to do something is covered across multiple semi-overlapping pieces of documentation (some of which are up to date and some of which are not) are all a real strong indicator of inadequate centralized ownership of the docs. And the AI ain't gonna update the docs if nobody tells it to. (And AI still requires a great deal of micro-management to be used effectively in docs authorship.)