CAD is not just drawing. CAD packages are often integrated with other software that does things like stress analysis, BOM, thermal simulation, and so on. Its a

CAD is not just drawing. CAD packages are often integrated with other software that does things like stress analysis, BOM, thermal simulation, and so on. Its an entire ecosystem that streamlines a lot of things, so it makes sense to invest in it. The reason for Windowsis because a lot of the CAD software utilizes gfx drivers heavily for rendering. You can do things like raytracing to simulate how the product will look.