3D people like me have been downgrading to Win 7 because Windows 10 ties up the vRAM on our graphics cards - 1.3Gb unavailable on an 8Gb card is significant - but moreso because the available vRAM is limited to that of the lowest-rated card - having three GTX 1080s does not equate to 24Gb vRAM, but 8 - so if I want the vRAM I paid nVidia for, I have to run 7 on bleeding-edge hardware. But hey, there's only a couple million of us - spare a thought for the NHS running XP...