> native RAR and 7-zip file support That's pathetic. You know what a cool OS would do? Allow the user to install datatype handlers for such things without MS even being involved other than providing the API. 30 years ago. Not that I really care. Microsoft announced Windows 10 as their final OS, so as far as I'm concerned, once they stop supporting that, they no longer have an OS.
It already does and you already can if you're the 1% (Yes it probably is that low) who knows what rar is and how to install the software. But after this you can also send a 7z/RAR file to your grandparents and know they'll be able to open it without also becoming 7zip tech support.
Hell, I kept my parents on Windows 10 and intend to keep them on it for as long as possible. Too many headaches and calls asking why "things are different now" otherwise.