Release vs release group series - later releases

[chaban]

Release group series vs Release series [STYLE-421]

asks to clarify when release series should be used, and when release group series. This is not something I have a very defined opinion on just yet. I try to use RGs when possible because it seems better than adding n versions of a release to a series, but at the same time (as I mentioned in the comments of that ticket) I’ve seen at least one case when what seemed like a very obvious RG series suddenly included a re-release of an existing album (that wasn’t originally released as part of any se…