Project Memento allows you to manually or automatically fix honking huge meshes. The team recently provided Shaan Hurley with an update. He posted it to Autodesk Labs while I am on vacation. It is available for download via Autodesk Labs on the Autodesk Feedback Community site.
So please continue to share your feedback at firstname.lastname@example.org or the discussion forum on the Autodesk Feedback Community.
Making a huge mesh is alive in the lab.