@pro I definitely have run into plenty of models that have to be scaled by 24.5x to make sense, and a few 10x, but fortunately, mm seems to have mostly won by now.
I've definitely worked successfully on STLs in FreeCAD, and I'm happy to share more, but not trying to talk you into it. ☺ So let me know if you want me to share more. Otherwise I'll just celebrate the idea of STEP export from OpenSCAD. 😀