Not disagreeing with any of that, I was just thinking that very little of what's generally useful in blender for making art transposes well into something usefu

Not disagreeing with any of that, I was just thinking that very little of what's generally useful in blender for making art transposes well into something useful or convenient for CAD. The whole mindset is different: you generally don't scale anything when designing a mechanical part, you specify or parametrize dimensions (because catalogue items like fasteners won't care that it looks awesome at 123.6%), and similarly, you don't move things by arbitrary offsets in arbitrary directions, you add assembly constraints so the kinematics make sense. I'm sure CAD Sketcher will grow a ton of convenient shortcuts too, I don't think they'll have much in common with the rest of blender.