In my experience CAD/CAM users are experienced in their speciality, e.g. architecture, mechanical engineering, etc, but often are not very computer literate. I

In my experience CAD/CAM users are experienced in their speciality, e.g. architecture, mechanical engineering, etc, but often are not very computer literate. It's not due to a lack of intelligence, but they have better things to do than to become IT specialists as well. People in these fields, generally start out in larger firms and thus are only familiar with Windows as good corporate staffers. Those that go freelance or join startups, tend to continue using what they are already familiar with. The CAD/CAM software vendors are motivated to go after enterprise licenses, thus there little incentive to support anything but the most widely used operating system.