Anecdotal evidence isn't to be trusted. You haven't seen much Windows in your world, I've seen very little linux in mine.
A finance firm with over $50bn under management had over 300 Windows servers and maybe a dozen linux machines. Mostly security appliances, firewalls, etc.
A law firm with offices across the globe has over 600 Windows servers and not more then 2 dozen linux machines. Again, mostly security appliances.
Having worked at both these places I can assure you that the licensing fees are a rounding error in the overall expense budget.
A finance firm with over $50bn under management had over 300 Windows servers and maybe a dozen linux machines. Mostly security appliances, firewalls, etc.
A law firm with offices across the globe has over 600 Windows servers and not more then 2 dozen linux machines. Again, mostly security appliances.
Having worked at both these places I can assure you that the licensing fees are a rounding error in the overall expense budget.
That said, I run only linux and mac at home :)