> People who simply don't like Microsoft will not use it just because it's open.
You're forgetting that a lot of people traditionally haven't liked Microsoft because their software wasn't/isn't open. Yeah, Windows would still be a steaming pile of bovine manure regardless of which license it was made available under, but the availability of that source code would make it easy for better, Unix-like operating systems to pick up the necessary pieces to support Windows software, thus continuing to allow Microsoft to profit on their non-operating-system software (Office, SQL Server, Exchange, IIS, Internet Explorer^H^H^H^H^H^H^H^H^H^H^H^H^H^H^H^H^HSpartan, etc.) regardless of whether or not Windows itself is widespread in usage.
You're forgetting that a lot of people traditionally haven't liked Microsoft because their software wasn't/isn't open. Yeah, Windows would still be a steaming pile of bovine manure regardless of which license it was made available under, but the availability of that source code would make it easy for better, Unix-like operating systems to pick up the necessary pieces to support Windows software, thus continuing to allow Microsoft to profit on their non-operating-system software (Office, SQL Server, Exchange, IIS, Internet Explorer^H^H^H^H^H^H^H^H^H^H^H^H^H^H^H^H^HSpartan, etc.) regardless of whether or not Windows itself is widespread in usage.