So, maybe the concept of such a feature, could be really useful, for some people.
But, it needs serious controls, limits, user feedback, safety mechanisms and things. Otherwise (as widely reported in news articles about this), financial information, actual text passwords, and even things a person shouldn't really be doing, but if a wife finds out, that might end the marriage, etc.
Ultimately, it really needs a reliable trustworthy company, who doesn't almost secretly and silently, update their software, overnight, to suddenly grab even more information and upload it to the mothership.
E.g. Once privacy settings have been set, in windows, it definitely shouldn't switch them back off again, due to an update. If it does, it should ask the user and warn them about it.
But that doesn't seem to be how Microsoft, understands the situation.
Really, it is our private information and should be up to the users to decide, what if anything, is shared with Microsoft servers. Why Microsoft can't seem to understand this, and why they can get away with it in the market place, I don't fully understand.