If you use anything like a skylake or X99, using win7 is just wrong. The updating process is outdated, the out of box experience is outdated, and supported hardware is outdated. You need drivers for EVERYTHING, and windows updater can't install anything by itself. Not just that, it needs a shutdown to install them, compared to the automatic restart w10 does.
For me personally w10 is the future and w7 was GREAT but it's done it's duty, time to move on. Yes it's a bit different, but boy all the new goodies like M.2 and usb3 out of the box support yes please. Also go pro or, pun intended, go home. Being able to defer updates is a godsend (last weeks secure boot patch /shudder).