In the cases that most of you are referencing are aesthetics.
I moved from Windows 7 to 8 purely for the performance increase that it offers, and yes there are huge performance benefits. However i've modded my Windows8 to be aesthetically the same as windows 7.
So long as that option is there, no matter if it is third party or vendor, I will most likely move to 10.
You can moan all you like about the Tiles / Metro / Charms, what you don't realise is that you can disable most of them through the registry anyway. If you are looking for a system that brings performance increases and functionality (DX12), then surely you can take the time to learn how to personalise the machine to you?
Also, as a point the Charms bar does not exist in Win10 desktop, however it can be accessed through touchsmart media by swiping still.
Heck, i've got Facial recognition on my Win8 desktop which has been added as a default in Win10 with Hello!
Stop looking at the things you can change, and start looking at the work that MS has actually done under the hood.
Have a read through of
Windows 10 vs Windows 7: Should you upgrade? and it will actually highlight some decent improvements compared to Windows 7, a few were available in Win8 but those have also been improved.