I'm a bottom feeder
My ancient notebook at home runs Windows Vista. My other PCs run various distros of GNU/Linux. Looking at that chart my choices of OS are competing there for the bottom position. It's not much of an issue for me: I seriously started using GNU/Linux about 2 years ago and my interest in Windows just dwindled -- mostly because of MS' licensing policies*. I'll probably replace the ancient notebook if Windows 10 turns out to be useable and it can co-exist with other operating systems on *my* equipment that I *bought*.
(At least my work notebook runs Windows 7 so I can still feel like I'm part of the herd).
* My OS is tied to a specific hardware configuration and I have to pay again if I upgrade?!? WTF? What next? Do I have to pay for my orange juice again if I pour it from the bottle into a glass?