This makes reference to cases like:

• vinyl with bundled CD (https://musicbrainz.org/release/0ae5b000-e5fe-46ea-a11e-2089aa743a28)
• CDs with DVD (https://musicbrainz.org/release/61643390-71fe-46dd-b509-fb77128978f9)
• CD with digital download
• ...

It seems to me that those should not really add to the 'disc count' of a release and be treated differently as standard multiple mediums releases.

My first thought was that this could maybe be easily made by allowing multiple mediums at the same position. This could work well for the first example but how to treat cases with one medium corresponding to multiple (2nd example).