While I agree with @lubos that AI will be definitely useful to answer common questions and provide basic examples, what AI fails at is nuance which is usually the case with business specific questions.
And while I can see how AI can help with keeping up with the developments better so than humans–a problem which @Tut brought up, however, AI shouldn’t be the only way for a user to understand the software.
A user with specific needs will see more benefit in reading a comprehensive guide and understanding the system for himself and later designing a solution that solves his problem according to what they understood from the guides than say being mouth-fed a generic solution by the AI, which can be limiting.