That is only one argument from one side of a long and on-going debate of Microsoft vs. Linux. Even though Linux is used less often as a desktop OS, various distrobutions of *nix are used for secure and stable computing; varying from McDonald's to web servers and routers. The statement that only 0.2% of desktops use Linux may be accurate, but if you take into account the amount of other *nix operating systems that are in use for other purposes besides desktops, and also the severity and reliability demanded from those computers, that specific argument is more of a toss up.