It's a bunch of actual people designing buildings that cost so much more than a Windows license doing Real Things that have some lingua franca interface that has no reason to go Linux and probably never will, because in that business they're too busy with actual priorities to ever even discuss how the status quo could change. There are 10,000 industries like this, and probably 10,000 people to each of those who simply don't care, because to them the computer is and will remain only a tool. That's the world of Windows we can't see.
Once you get beyond small teams doing the work, this starts to play in massively. Pretty much all medium+ sized studios have their artist pipeline on Linux, reserving Windows or macOS for tools like Adobe, ZBrush or Marvelous Designer that don't have a Linux build yet. And where I'm at, the operating system itself doesn't even matter to the artists. All they need to know is "this button opens terminal, this command puts me in the right show, this command launches the hub" and from there they're in our GUI pipeline. Their environment is the DCC, not the OS. For all intents and purposes it's completely abstracted away from them.
That's not to say there aren't those that take advantage, creating custom commands and utilities to share with others. But for the most part the fact that it's not Windows or macOS doesn't bother them.
Eh... outside of the broadcast motion graphics group, small personal/business farms, or educational institutions this is largely a majority Linux area.*
*I'm speaking from the perspective of public cloud farms and the feature film industry (for VFX and Anim). You can't escape Windows for select software and plugins, but if it's not a strict requirement by the software, then it's a business choice for other reasons (i.e. existing environment, staff, etc) because you will from a technical standpoint operate at a loss using Windows.