Respectfully speaking, I think the new message is far too long. The first few times I saw it my eyes just kinda glazed over. The screenshot @braden posted is nice and to the point.
Backstage is a 3rd party tool and it reads from cataloginfo.yaml. One reason to keep things in catalog_info is that you need to be a part of the Open edX GH org to see backstage.openedx.org. Now, we’re happy to add community members as triage users, but you have to ask to do that. catalog_info.yaml is visible by anyone.