Not sure what the happy dance is. If you are referring to the Plex Dance, that’s not it. The Plex Dance is for individual files. There is no “dance” that I’m aware of related to renaming folders.
To be clear, you do not need a file in each folder. You need at least 1 file to exist in the folder that your library points to.
So if you have a Movies library that points to some "\MoviesForPlex" folder, you need the file in that "\MoviesForPlex" folder. If you have subfolder in there, that’s fine, you don’t need a file in those, just in the main folder.
If your library points to multiple locations, you’ll need a file in each location. etc. A blank main folder will be treated by PMS as if it’s not there and no changes will happen.
