What you know doesn't only live in your head. It lives in the work that you do.
It lives digitally too - scattered across your notes, apps, messages and cloud storage.
One of the main reasons why you'd want to write something down is if someone else needed to know what you know, or, you didn't want to forget.
AI changes that and gives us another reason. For the first time, something else can act on what you know - but it needs a way to access it.