If you try to change units and allow Rhino to scale the model then worksessioned files take forever to scale. It appears that each object is scaled sequentially as I can watch the individual objects disappear from their original scale and then reappear at their new scale. This process is really slow; taking over 10 minutes to scale a larger model. Its way faster to detach all my worksessioned models, change units, and then reattaching the models.
If this could be fixed that would be appreciated.