Personally I use Windows 10 for gaming, Linux Mint for my primary (daily) and Apple iOS on my cell phone.
All three have their strengths and weaknesses.
Windows has the lion's share of users and the vast majority of games are written for Windows but due to Windows massive market share they are the primary target for hackers and malware. A negative and positive is now Microsoft has tightened control of some aspect of their OS, positive in that it keeps the OS up to day with security patches , negative in that often the mandatory Microsoft updates "break" something........
Linux Mint It probably the most Windows like in appearance (in my humble opinion) and is a solid OS that typically requires very little to no tweaking to get things to work and has a massive support community to help out. That's also a bit of a drawback because of the number of people offering different solutions to the same problem and can be confusing to a new Linux user. The other drawback is a steep learning curve with some aspects of Linux like installing programs (packages) that are not in the Software Manager. It's a different file system, there is no .exe to set up new applications.
Adding 'Wine' will help run many Windows applications if one chooses to do so and even though it's getting better every year it's still somewhat limited.
Linux is also generally more safe primarily due to it's low market share concerning PCs and (for now) the availability of computer games able to run on Linux is still pretty small.
All super computers in the world now run off of Linux.
iOS is the operating system for Apple phones, intuitive and fairly secure. The one real drawback for some is Apple's super tight control over their OS and that's true with OS X which runs their computers. Cost is also a factor specifically in the computer market, they're just expensive.
I use Windows 10 for everything on this computer. I've had very few problems with it. I have no desire to change.
And that's the thing, "no desire to change" that and familiarity sometimes combined with disinformation is key. For disinformation I'm referring to, "Linux is for geeks" or "Microsoft wants your soul" or "Apple computers never break".........
People use what they like or simply what they are familiar with and usually will not change unless specific personal circumstances force them to. That's why I never advocate one operating system over the other, oh I may rant and rave on occasion and joke around in good natured fun but as with politics, etc I do love messing with acolytes.......
)
