I was talking more about the upstream providers vs the fight for developer time. while there are lots of users on windows - the vast proportion of developers are on either linux or mac as their primary machine.
Linux has dominated server space for a long time. It is now also dominating the machines used by developers.
Windows only = windows only developers = very limited number of developers willing to develop for your platform.
So "Manufacturers that only supply software that works on Windows and not under WINE"
Are manufacturers that reduce their developer pool to such a small number of developers they will face pretty much guaranteed failure in the not to distant future.