Many people can't seem to let Windows XP go. They never embraced any OS past XP. Face it, they are die-hard XP fans. However, you don't find much love loss, (myself included) when it comes to the Windows 8.1. OS.
Actually, many people I have spoken with said that their company never transitioned to Windows 8.1 for one reason or another.
Did your company or organization ever embrace Windows 8.1? If so, do you still use it? We only had one classroom with Windows 8.1, a total of 32 workstations. The rest of the Enterprise was running Windows 7. It was a bother to maintain versus the rest of the campus. It has since been replaced with Windows 10, and quite frankly, I am glad to see it is gone.