Whether "Linux" is a good or bad choice, or whether it will become a mainstream desktop OS is besides the point. At least, if we want to stay on topic here.
The original question was whether you can disable Windows 10's privacy-invading features. Some posts argue that you can (by changing settings or by cutting off network communication with Microsoft e.g.). While there are things that you can do that appear to increase the user's privacy, it will always be necessary to trust the company that you bought your proprietary software from to believe that you actually have privacy.
This is where the free software argument comes in. You can debate whether it is a good competitor or which GNU/Linux distribution or BSD is better (for whatever reason), but the point here is that if you are using software (and you are connected to the internet at any point), it must be free software in order to be reasonably certain that you can protect your privacy.