Linking/Pasting several design options for one building/object into a separate scene file. Rhino notices block name conflict and gives you a choice.
If you decide that you want to duplicate the blocks (to change their materials later) you have to manually rename each instance (happens if the new name doesn’t follow the “name ##” convention, as far as I can tell)
Add an option for batch rename where you can add a suffix or a postfix or whatever your soul desires.
In the image below, checking “Do this for all block name conflicts” doesn’t seem to work when changing the suggested name with auto-numbering (which is ok but not explicit enough and doesn’t say anything about which model does this block belong to)