I have had success in the past exporting directly from SU, which is effectively exporting geometry to Modelspace. I used to think that was all you could do. But then someone put me right and said “of course you can export from LO”. I assumed that meant that geometry would be exported to Modelspace and LO stuff would go to Paperspace with the end result looking pretty much identical on either platform. But life is never that simple is it?
Here in the UK, most of those involved in architecture/surveying/engineering still use the dreaded AutoCad and so that has become the de facto standard. So it can look a bit naff if you cannot exchange files readily between any other platform and AC. Obviously, an end user wants any conversion process to be quick and seamless and not have to dive under the bonnet each time!