If you slipstream USB3 drivers into the Windows 7 installer you shouldn't have too many issues getting through the installer.you can, i just did installed windows 7 in my kaby lake in my samsung nvme a month ago..
but trying to get updates throws up the "your cpu is too new" message, i am sure there is a not official way of getting rid of that shit and still get the updates tough
but installing and using windows 7 works fine
however, windows 7 will give you pain with usb 3.0 in some cases, and that doesn't matter to which cpu you have