I don't need it ... at that time I use to work with Win3.1 so I know exactly how it looks like - flat as hell. All these pathetic icons and solid-color windows in whom everything is merging into one. Where is 3D and glass effect, why regress instead of progress? - I asked some guys from Redmond and they said that "it's a price of Integration". Moreover, from now on all will be monitored by Microsoft: you, your NET-life, your friends - there is no longer room for individuality.
BTW: if by chance you did not backup your Recovery Image before updating to Win10 then you can forget about your old OS - Win10 will overwrite the MBR.
So it's flat is the only thing you can come up with? Spoken like a true troll. Windows 10 looks nothing like 3.1. Not even close. I honestly love the more clean look of Windows 10 too. I don't need something super flashy, I need something that works, and Windows 10 works wonderfully.
Flashy design isn't progress. DirectX 12 is progress. The same OS running on PCs, tablets, and phones is progress.
As for the privacy stuff, you can turn most of it off, and your internet browser and ISP already track all of that stuff so you better quit the internet too while you're at it.