Or actually, fuck it, just recompile Windows 2000 for AMD64, delete the Windows 10 source tree, and call it a day.
Does anyone remember its missing WiFi-support? It’s almost non-existent USB2-support? It’s absolutely atrocious boot-times (even compared to NT4, especially compared to Windows 98)? Made even more painful by its absolute rebootey-ness after updates?
There’s lots of warts here your memory is probably glossing over.
I’m pretty sure if I were to ditch Win 10 now and go for a Windows reboot, I’d base it on the technologically much improved Win 7.
Windows 2000 just gets out of your way and works. It's such a refreshing feeling in 2018 using computer software that doesn't try to sell you anything or steal your data.
You are right about the boot times but on a modern-ish system with an SSD, it's no big deal. And obviously, if you were to do this, you would also backport support for newer hardware like Wifi, USB2 and 3 ;)
I don't miss a lot of UI things from newer Windows, either. I do like being able to hit the Windows key and start typing to find stuff. Also, being able to snap windows to the left half/right half of the screen.
So the ideal Windows would be Windows 2000 with the hardware support and selected UI improvements of Windows 7 :)