That would mean that only Tim would be able to announce the plugin releases for Classic Commerce. Up to now I have been doing this but I’m not in the plugin developers group.
I think a plugin release or plugin news category might be helpful (and theme equivalent if required). At present, such announcements are made in the #plugins:plugin-support category along with a tag such as #classic-commerce but it would make sense to keep the support category free for support issues. We still need to use appropriate tags though.