I also think that documentation implies long-term support, and a commitment not to change the expected behavior. Any time you document something, you are telli

I also think that documentation implies long-term support, and a commitment not to change the expected behavior. Any time you document something, you are telling people that this is not only the way that the software works now, but also the way that you intend it to work in the future. That established intent seems anathema to Google's culture, with the amount of churn and project cancellation that exists.