Comment 3 for bug 1974090

I am specifically talking about the charm channels, not openstack-origin.
This rule should only apply to openstack charms, because other charms may want to keep things simple and not offer versioned channels.
Also note that many openstack charms don't yet have stable releases in the versioned channels, so as of today the use of latest/stable remains necessary. This bug will become more relevant when we'll have releases in the {stein,ussuri,yoga}/stable channels.