There are way too many Specialist programs that simply do not run in XP Mode or anything newer than XP. If you are stuck with one of those Specialist Programs you'll keep using XP just the same as those who are still using 98, NT4 or W2K.
Makes very little difference to the systems that run these OS and even the CAM Devices that I support are still on DOS so what's the real problem?
Sure for a Run of the Mill Office who only used a couple of the Packages in Office there is no excuse not to already have changed but for everyone else it's nothing but another
Big Yawn and more of the same that has been heard so often when previous versions of Windows has Ended Support from M$.
Of course if you are willing to pay you'll still have a few more years of Support but I personally don't know any business in that boat. They pay their IT people to lock their systems down and make them secure so you take other steps and remove them from direct attack.

Col