We try to avoid having orphan releases in the database
I have the impression it's because some of the releases were created in anticipation of the performances.
There are still 84 set up by active editors.
Surely, everybody tries to avoid adding 'orphan' releases and likely, they are being added because they include recordings to be added, too (not vice versa), and there are many reasons why that occasionally doesn't happen.
There is nothing wrong with being reminded if one is found and if any active editor turns out to have added loads, it's surely worth (and more loyal) to notify him/her via PM rather than blaming indirectly by referring to stats.
Anyway, I have (only) one left and will look into that one in due course. Thanks for reminding.