Some issues with "Git the standard format": * Does not track cherry-picks * Does not track branch names * Tags must be unique. (You cannot add a "r

Some issues with "Git the standard format": * Does not track cherry-picks * Does not track branch names * Tags must be unique. (You cannot add a "release" tag to every release, for example.) * Not easily extensible - witness the pain and years of effort trying to move from SHA1 to SHA2.