Too goddamned bad. If you're stuck on WinXP / IE8 and some old email system, stick with appropriately old shit. No one cares about these people.
Like it or not, Microsoft wins a lot of points for supporting older versions for a decade plus. They might lose a few bucks on a new Windows license but make it back on reputation and other enterprise tools.
That means large numbers of organisations were still installing Windows XP as their standard desktop around 3 years ago, and possibly even more recently than that since they wouldn't necessarily have evaluated Windows 7 and set up to migrate to it from day 1.
Moreover, the days of upgrading hardware every 2-3 years are gone, at least in typical office environments that aren't really pushing the performance limits of a typical office PC any more.
In other words, for large organisations that keep relatively up-to-date, it's still entirely possible that they have a lot of WinXP machines still around today, even if their newer machines are on Windows 7 now.
The world is changeing and the enterprises will have to adapt.