[Pharo-users] Pharo using old release of Announcements?

The implementation of Announcements in Pharo 1.2.1 looks very different from the one in VisualWorks 7.7.1. For example, VisualWorks implements Object>>announce: , meaning that classes that want to “announce” , can simply reimplement #subscriptionRegistryOrNil , while in Pharo you need to inherit from Annoucer or reimplement all its methods. Does anyone know why there are differences between the two dialects? Is Pharo not keept up to date in this area? Kind regards Runar