Naldan said:
It doesn't matter what you can opt-in or opt-out of. These features are there and the trust is gone. Since the whole PRISM scandal, I don't believe a single word they say about secure privacy. There is no way that this trust will return.
Except those features that are causing privacy concerns include, among other things:
-One Drive: Which literally can't exist if you aren't sending Microsoft data. That sending of data is entirely on you.
-Bing: A search engine, which again can't exist if it isn't at least collecting your search query.
-Cortana: Which is turned off completely by default and you can't turn it on until you agree to Microsoft's privacy policy.
-Outlook: Which again can't exist if Microsoft can't have any email data to store on the computer you need it to be stored on.
-Edge: Which needs you to input data so that it can send it wherever you specify.
-Office 365: Which needs you to provide that data to Microsoft so that they can make it available to everyone else. Otherwise, you're left with email, which I've already mentioned.
-Skype: Which needs to at least send audio and text data to facilitate communication.
And on and on. Bottom line: A lot of stuff simply can't exist without some form of data transfer. Microsoft at least maintains honesty by letting you know that such data transfers are occurring. Sure, there are ways to increase security in some of these areas, but that also has to be weighed against losing convenience. For instance, many email providers that attempt to increase encryption security lose features like IMAP and, as a result, compatibility with MUAs (e.g. Thunderbird) or other email providers (at least not without some serious hassle).
Ultimately, it comes down to whether or not you want the convenience or...peace of mind?...And as far as Windows 10 is concerned, Microsoft gives you that option and also makes you aware of what your options are. If you're that paranoid, you don't have to give them anything.
After all these backdoor-scandals and spy scandals, how can you believe MS is acting in such a good faith? Even if they wanted to?
Prior to the Snowden leak, there was little incentive to challenge the government. In fact, there was every incentive to go along, since challenging the government would incur heavy costs. After the Snowden leaks, many companies began to see that people didn't like the prospect of government spying, and companies like Apple, Microsoft, and Google have taken steps to protect users' information against such spying if for no other reason than PR. Microsoft in particular has threatened to sue the government, threatened to violate laws that said they couldn't remain transparent with their consumers, have discussed moving their servers to countries with better privacy than the U.S., among other things.
In short, pre-Snowden didn't offer an incentive. Post-Snowden does, and Microsoft seems to be among the companies trying to maintain user privacy (as best as can be done with the technology everyone wants) in a post-Snowden era.