@itsfosseye washing ! Linux is free but the service around is for companys not free.
For being really top of the world the better service contract wins. My rocket company has contracts with both IT worlds, FOSS and no-FOSS. Fact is Linux Desktop costs more for service. Think about Enterprise-Linuxes. Why only few Distros offer it?
And why doesnt the Arch-Joker here never tells about them ? Think twice