Like I said, I just saw a vid with Wall Street monitors in the background two days ago with windows XP logos in the background, not making that up. I had Vista, couldn't run most peripherals. X? I wont bother. Missing codecs and this and that.
Maybe they are running it virtually to be able to use proprietary or legacy software. Businesses were fond of XP.
Support for 7 ends in 2020 so an XP user might as well bite the bullet and jump to 8.1 or 10.