STEP and IGES do work. Depending entirely on one’s definition of work.
Through no fault of Rhino, SW is super hung up on construction planes, constraints, Bezier entities, etc.
And nothing I know of pushes these through a standardized file type.
Also, OnShape works pretty good as a .sldprt translation tool, so it’s not a matter of geometry not making it through filters - that can be done reasonably well.
My intention is to find a ‘best practice’ to make software use a non-issue, knowing the devious practices of the SW developers.