I'll have to think about this. I may have to publish some reposync based "snapshotting" backup tools to produce labeled, datestamped "8-stream.2020-12-01" style repos.
Erm... isn't this called repomanagement. Both Suse Manager(Uyuni is the upstream) and RH Sattelite do great job on that.
Best Regards, Strahil Nikolov