MS wants you to use games it runs on your browser, which opens to the Internet, which makes you Internet connected (whether the game is playing others “live” or not) and being Internet connected MS is tracking you just as Google is. THAT’s why they do it, and that’s why they do things like the “cloud”. It is not your convenience that interests them, it’s your trackability and access (in the cloud) to your stuff that they seek to gain awareness of - awareness for THEIR purposes.
Your comment, “ It is not your convenience that interests them, it’s your trackability and access (in the cloud) to your stuff that they seek to gain awareness of - awareness for THEIR purposes.” goes for more than Windows 10.
I implore everyone to consider those words in relation to you every action.