From my experience, the vast majority of people have little to no clue about how to properly, securely, and safely setup and maintain a Windows install and generally it's worse to let the OEM do it for you with all the bloatware and the like they include. I'm being completely honest here and not trying to belittle anyone. I've professionally supported nearly every version of Windows from Windows 3.1 up to and not including Windows 10, as well as other OSs.
Using Linux, for the most part, is just getting used to things that are a little different. For "power users" the extra versatility/functionality, stability, security, and customizability are a huge advantage in many cases.
I still use Windows, but like others here, I will not be switching to using Windows 10 on my PCs. Linux is the future.
I started using Linux (Debian/KDE) in virtual machines for servers and then transitioned to using it as the primary OS on some of my machines. I still use Windows 7 on my main PC and host servers in virtual machines still, but Windows 7 will more than likely be the last Windows OS I bother to use and maintain for both myself and my family.