Which project(s) made you go “I can't believe this is open-source”?😎
I love FreeCAD and i use everytime I can. It has an incredible range of features and is (becoming) stable enough. But, sadly, the world of CAD is fu¢{|Ng proprietary, if you are not 100% compatible with the Autodesk stuff nobody will ever consider using it on a production environment (e.g. architecture or construction). And off course, Autodesk does it's best to keep file exchange uncomfortable