I think we’ll just get more documentation not better documentation. There never was a problem generating documentation from code. It’s the business context and use case documentation that’s hard to generate.
That doesn't match my experience at all. Before AI, generating documentation from code was either getting some embedded comments for a function call, or just list a function's arguments.
AI reads the implementation, reads the callers and callees, and provides much smarter documentation, with context. Something sorely lacking from previous solutions. Is it sometimes not completely accurate? Probably. But still a giant step forward.