I have used Computers when there were windows Xp, Windows 95, Windows 7 and Windows 8. Although it has been more than a decade for Windows XP, I prefer it anytime compared to all the said operating systems. The reason being it was easy to understand and work, it was well designed and implemented. It supported almost all kind of functions and systems. It is still very compatible and addresses issues pertaining to system.
Yes, the upgraded versions have much more updated and improved software but then they are complex and at times difficult to understand and work with. There are still even large number of users using Windows XP because of and does not find a major upgrade in their operating system.