Loading STEP files into some other CAD software can take quite some time
depending on the complexity of the STEP file.  A board with a lot of
vias takes several minutes to load into FreeCAD.  While 3D component
models can be excluded (worst case even by deleting individual ones
after export, like all bypass caps), editing the board itself is not
that easy since it is one single 3D object.

This adds a STEP export setting to exclude all holes/vias below a given
diameter.  (Generally speaking, while larger holes can be important to
have in the STEP export, there's generally some cut off below which you
don't care, like 1mm.)