@RainerTrummer hi, enabling add-ons on the command line is working in my tests.
The issue with reporting bugs here is I end up needing to ask follow up questions and try to find out what your doing on your system that’s different to mine, so please just report bugs in the tracker because it adds noise to these threads & risks developers missing reports before release.
In the end, since we implemented the simpler way to download the missing add-ons from within Blender (and the system local repository to make portable installations), I decided to leave the backwards compatibility bundle only on the wiki release notes.
You should be able to prepare such directory, and either use it for yourself, or use it in a more controlled environment for all Blender users in a studio with internet restrictions.
Quite sure it is only the “parent” add-on which will be showing up in the list. but maybe someone closer to the project can confirm this. That section is about avoiding creation of panels/operators with the same identifier.
P.S. I was thinking where is the good place for such sort of questions would be. In a way, it is not really announcement, and doesn’t really fall under “contributing to Blender” category. Perhaps #python room on the Blender chat is where there are plenty of developers who can more instantly share knowledge and such?