Idk man I’ve worked with hundreds of companies of all shapes and sizes as a consultant and I’ve never once seen one that used non-windows workstations with the only exception being Macs used in software development. And I’m also fairly certain that the Microsoft server market share would be much, MUCH higher if you didn’t count web servers. Web servers are the only type of server I’ve seen be Linux in the majority. Most web service companies I’ve worked with even had Windows servers working behind their Linux web servers and load balancers.

I say this as somebody who hates Microsoft with a passion and would rather work in an all-Linux shop but a non-Microsoft enterprise just sounds like a unicorn.