If this is a "reason" to leave then it shows you have no idea what is happening or what this does. Hint: There is no change to the user in the slightest, not in snooping or prying, not in taking copies and storing on their servers, etc.
We don't need to put up with this, people! Escape while you are still able to do so.
Why? No seriously why. Picture me as a user who doesn't care or understand about privacy and tell me the impact to me. The personal impact. Assume I am a normal user who doesn't give a shit about privacy in general. How will Microsoft directly make *my* life worse?
This is the problem with privacy. It's a word thrown around with a nebulous meaning that ultimately boils down to some contrived scenarios that aren't being played out in a way that affects users. You won't ever convince a user to do something without demonstrating direct harm to that user, unless that user is a conspiracy theorist.
The same argument is about privacy and tracking for targeted ads. Okay so I'm currently getting ads for Nike shoes because I was shopping for Nike shoes the other day. Whoop de do. What about a time before tracking? Oh well back then I still got ads, they were mostly for hot singles in my area or spanking the monkey, or gambling or what-not. I've had this discussion the other day with a non-tech person and that person ultimately came to the conclusion personal tracking has actually *improved* their experience. At that point the topic of not being tracked was moot.