I noticed that you could open a "slddrw " (heavy) with "edrawings" in record time (even if the latter are corrupted!), so I deduce that the drawings are still present in the "slddrw",
My question is, is there a way to convert these "slddrw" to "dwg" without regenerating the drawings,
To export faster I do it frame by frame (usually the only one I'm interested in is the top view. On a plan with 77000 components export the complete plan is about 12 hours... For only one of the 2 existing views, less than an hour to do so, click in the view and in the left pane, expand, save the view as, and click on the floppy disk. (the recording time for part has nothing to do with it anymore)
And then if necessary I put back but 2 or more views under the drafsight software or other in dxf or dwg of your choice.