Why do you think Microsoft was/is trumpeting that "XP is dying" call so hard? I don't remember them doing the same thing with any of the other OS's or software that reached EOL. It's because Microsoft's biggest competition is (and has been for a long time) it's own installed base. XP works. People are happy with it. No need to upgrade. That means no new desktop which means falling computer sales.
It's actually XP itself that was unusual here. No other OS version from Microsoft has lasted so long, or continued to be in such widespread use for so long after it's release date. They actually did the very same with IE6 a few years back.
XP was a great OS in it's time, but time has moved on. It's no longer good for multicore, it's no longer good for larger amounts of memory, it's 64-bit support is a joke. It was designed around certain assumptions that were valid for the hardware of it's time, but the hardware has changed and those assumptions no longer hold good. Sure it'll still work, but it's not getting the best out of your hardware.
It was also designed around certain security assumptions that are hopelessly naive today (and have been for a long time). Remember the great release of SP2? When Microsoft held up the development of what was then called Longhorn in order to paper over the cracks? That was 2004 (10 years ago!) and it was already showing the cracks even then.
The reality is that Microsoft were their own worst enemies. If Vista had been a worthy successor at RTM we wouldn't even be having this discussion today. XP would have EOLed on it's original schedule (which has been extended well beyond what it should have been and well beyond what's comparable with other Windows versions).
Don't forget that Windows 7 was the fastest selling OS ever. It even outsold Harry Potter on Amazon. Because people were ready to jump, they wanted to jump, but until then there had been nothing worthwhile to jump to.
It's easy to forget that when XP was originally released there was a chorus of "why should I upgrade? 98SE is good enough. It works. It does everything I need." It would be interesting to find out if there's any crossover between those people and today's XP holdouts.
Aside from those, the other main holdouts are in the corporate space, where factors such as browser and other legacy app compatibility held sway ("so I've to spend another 5 million upgrading my Oracle software if I want to move to a new browser version? No thanks"). Again Microsoft shot themselves in the foot with Vista - they were too willing to throw out backwards compatibility, they delayed too long before releasing the server version so none of the cool new features could be managed, a lot of Group Policies and other networking settings just broke with Vista and you'd end up having to effectively maintain a separate network for Vista PCs. There's still fallout from that even today where mixing Windows 7, 8 and 8.1 machines on the same network causes some measure of grief.
So no, there's no legions of XP users howling to keep their favourite version of Windows around for longer. There's a few holdouts, a few Internet Hate Warriors, and a lot in the slower-moving corporate world (which is where the "XP must die!" push was really aimed at).