For some reason I thought that, instead of just hiding the New Folder… menu entry from Communities I didn’t want to do be able to add Folders, I removed the Folder content type from the Community Visibility > Visible COntent Types in my community.
That had the effect of removing the Folder content type from the Visible Content Types node of EVERY community. It is now impossible to add it back since the Folder content type doesn’t actually appear as a Content Type.
However, this seems to have had negligible effect on the functioning of Rhythmyx, in that all my Communities can still add folders anyway.
So does this matter? Or are there going to be further consequences? 
Thanks in advance…