Very nice indeed, thanks for sharing. 
Personally, I still prefer the NURBS-based MoI 3D editor (or Plasticity) for such modeling tools. Also, unlike in SDF tools there’s no option to establish a smooth color / material transition between the Boolean operands. But the variable bevel is really nice. That’s not even possible in SDF tools so far (it is possible in MoI 3D, maybe also in Plasticity).
The concept is similar to the free Bevel after Boolean add-on by the way.