Every major CAD software that I'm aware of has its roots in Unix. I personally used AutoCAD on SGI and Sun hardware with Unix OSes.
Give some market demand, they could switch back and support Linux
Give some market demand, they could switch back and support Linux
Lot of these are .Net based and .Net is now more or less cross-platform.
Your os is still a gatekeeper. I get the appeal of Apple products and the desire to work on a Mac and the rage of going back to Windows (Your file system uses backlashes? Your mount points use drive letters that can be hard codes into files, making resources unreliable users and devices that aren't mapped perfectly? Your files include a newline and a carriage return just in case you reach for the teletype machine? You did what to your start menu? My laptop battery just dies by default when I close the lid unplugged? The list goes on).
Famously, life is suffering and you suffer differently (maybe less?) by going where your tools are (for CAD in AEC it's still very much Windows).