When the enterprise CUI (and its resource/icon DLL) is located in a network folder and share by many users, I do not see why it "cannot be good" regardless there is a few users, or 70 users: the file(s) is read-only and only load into AutoCAD once (when AutoCAd session starts), unless you have a lots of users who always start AutoCAD at exactly the same MOMENT, and/or, you have made the enterprise CUI huge (thus the file size is so huge that takes a good CAD computer long to read it).