Win7 also has its own share of issues:
If you try to install it plus the SP1, clean, on a new computer, and then try to go to Windows Update, be prepared to leave the computer on overnight for several nights. It downloads the newest security updates at a snail's pace, and the download meter stays at 0% even though it's somewhat working.
I'm running WinXP/Win7 in my main desktop, Win7 in my server, WinXP on the Radio Station computer, WinXP on the workstation laptop, and Win10 on the latest laptop. I will look out for these Win10 issues on my latest purchase.