The ability to subscribe to these notifications on any project in SonarQube must be dropped.
We believe there are no valid use case to subscribe globally as soon as the SonarQube instance becomes significant. For smaller instances, subscribing directly per project won't be much of an issue. Anyway, for small and intermediate instances we plan on providing means to subscribe to groups of project with
these subscription have already been removed on SonarCloud
UI must be update to not allow subscribing to these notifications at global level.
A DB migration must be added to delete any existing such subscription.
SonarCloud won't be affected as all these subscription have already been removed.