Hi Matthias,
there is no content file necessary from SU10 on. So no one will be created and the old one will be deleted.
Every scenery package will be loading during the startup, in alphabetical order, which are included in the community folder.
You ONLY need a content file, when you want to priorize the loading order by your own. Under normal conditions you don’t need the content file anymore.
aircraft have and had nothing todo with the content file.
Cheers
Richard