> The power of this isn't just where geometry and dimensions are known. It's when the geometry and dimensions are critical to the function of whatever's being modeled.

Yes, but I meant making a case for workflow differences.

CAD is bad at aiding visual thinking and exploration, since you kinda have to be precise and constrain everything. You can pump out a rough idea of an object, edit it much, so much faster in Blender.

Sketching on paper, or visualizing in one’s mind, is pretty hard for most people when it comes to 3D. CAD is not at all inviting for creative impulses and flow. People who can do this in CAD are probably trained engineers who learned a very discipled, analytical way to approach problems, people who think in technical drawings.

So, CAD is good at getting a precise and workable digital representation of a "pre-designed" object for further (digital) processing, analysis, assembly and production. I think Blender is better at the early design process, figuring out shapes and relations.