[wiw2]

Looking back at your build123d code, it looks like the biggest differentiator compare to OpenSCAD and CadQuery is the expressiveness to assign shapes to variables, right?

I was able to check that box with PythonSCAD thus far, so that's "solved" for me.

Otherwise, I see a lot of vector/coordinate manipulation that isn't too different from OpenSCAD/PythonSCAD.

However, I can see there's some additional abstraction primitives with arc and tangents that looks nice. That doesn't quite exist in any OpenSCAD based or similar engine since there's no built-in way to get info out of the shapes in a reflection-like way.

Maybe I will give Build123d another go and see if I can sustain some sort of momentum.