Surprisingly not about security. See, after spending time trying to personalize things since I am used to doing so on Linux, I discovered a huge flaw in how Windows does personalization. It's completely limited. Sure, people unfamiliar with computers take Linux as too confusing because you can set up everything exactly the way you want to before you can do anything else, but windows is like the opposite. You can set up everything, but not be able to set it up the way you want it. For example, I made a High Contrast theme that looks like the interface to a program, and let's say this is an example. In Linux, this theme would carry over to all programs and thus have not text color problems or anything. On windows, it is effectively impossible to edit individual programs' themes, and the theme you use does not carry over to ALL programs- only specific ones, like Paint. This is kind of a issue with the programmers of software rather than a fault of windows itself, but there are way too many UI inconsistencies in Windows. Also, of course, it is completely impossible to replace the taskbar with a new one without extensive knowledge. Themes in linux can just about change anything, and that kind of personalization is much desired by people like me. Only being able to choose colors is too limiting.