We're at a point where a company makes an operating system used by a majority of the population while they force you to use your personal online account to log in, and they record everything you do on screen and collect an obscene amount of other information about you.
Picture MS getting breached in a couple years. What would that look like for you, the individual? Do you really trust all these screenshots are also locally stored? I doubt it. If they are today, do you trust they always will be?