Blender as a tool is very far from CAD-ey, in the sense that precision work - this should be 120 mm and that should be 1.41 times this - is not really a support

Blender as a tool is very far from CAD-ey, in the sense that precision work - this should be 120 mm and that should be 1.41 times this - is not really a supported workflow. There isn't even a constraint solver in Blender. You can make Blender work as a CAD-ish tool with practice and self-discipline and lots of keyboard shortcuts. But e.g. Fusion360 or even SketchUp is what a CAD-oriented workflow feels like. There is a big difference. Haven't tried this yet, but I expect it to retain enough of the CAD-oriented approach that the workflow still feels quite different from Blender.