I don't mean the IT department upgrading their own computers, they probably already done so, I mean as a company. If they run an old citrix or MS TS then they're locked into XP. I've seen this first hand. A lot of global companies haven't upgraded to the latest version and continue to run Software that even Microsoft no longer supports!
You assume that it is the decision of the IT department. I would imagine that the IT department would have less headaches by updating