Currently I use Windows 10+, because that is what is on the computer given to me by my school. If I had a newer mac with working usb ports(they fired shortly after buying a used mac) and a better battery life with retina display I would be using that as my go to.
I still use my mac when I am at work or just want to get out of the house to do my programming homework. So really I am ok with either one. Especially now that Microsoft has added support for VStudio on Mac.