My first comment is simply pointing out that there's always a #1 in anything you can rank. Windows happened to be what won. And I learned how to use a computer on Windows. Do I use it now? No. But I learned on it as did most people whose parents wanted a computer.

The comment you were replying to was about Microsoft.

Even if Windows weren't a dogshit product, which it is, Microsoft is a lot more than just an operating system. In the 90's they actively tried to sabotage any competition in the web space, and held web standards back by refusing to make Internet Explorer actually work.