Quantity versus quality propaganda
For generations, the concept of quantity and/or size has been put forth - particularly in USA, as more important criteria, even most important criteria than that of quality, and in some cases initial or long term value.
Years ago Chevrolet produced more Chevy Cavalier cars than did Honda for the Accord, yet no sane or knowledgeable person would ever conclude that the Cavalier was better than the Honda accord, by any measure.
Unfortunately, just as millions of Americans, and some in other countries blindly and nonsensically accept - without rational thinking the disjointed political philosophies and false concepts of those whom they wish to follow, millions of Windows 10 users "automatically" think that Windows 10 is superior just because of the 800 million number, and even parrot that figure as world’s greatest achievement.
Hackers, whether nefarious characters or even governments will continue to exploit the severe security and reliability weaknesses in Windows 10 or Server, simply because Microsoft and Bill Gates are American icons, and that no other desktop Operating System (OS) comes anywhere near 800 million users - which in most cases has little relevancy in intelligent, business or technological decision making on choice of using Windows 10.
Android and Apple iOS tablets have jointly replaced billions of Windows desktops in every area of technology (desktop type ) use, which Windows fanatics and dupes do not wish to talk about or recognize as reality.