Yeah, I think the post was meant to be provocative. After following the links, I got the sense that he was saying, in a subtle way, that there is no way you can create better-looking themes for Linux than you can with commercial products for Windows. Having used both for a number of years, I'd have to disagree, if that is what he meant. However, even if it were true, it still WOULD NOT influence my decision to choose Linux over Windows.
My decision goes way beyond appearances. My decision is based on security, usability, stability, responsiveness, and adaptability. It is based on the world-class kernel that is improving at an impressive speed. It is a world-class kernel that runs on everything from watches to most of the top 100 supercomputers.
I DO NOT like being pestered with license keys, re-registration sessions of the same product, DRM, spyware-checker updates, virus-checker updates, Adobe updates, Firefox updates, Microsoft application and "security" updates, etc, etc. As far as the ability to customize the desktop environment, Linux wins hands down. Unequivocally. Windows does not give you the choice of a window manager. When one considers how many desktop environments there are for Linux, the possibilities are endless.