[Solved] What is the reason Picard doesn't have "Genre" Settings enabled by default?

[outsidecontext]

@leeuniverse

However, when I use Mp3tag and then “save” the file, if I use double backward slashes () to separate the genre the file is saved with multiple Genre Tags, and most programs apparently only see the “first” genre, such as Windows File Explorer.

The double backslash in MP3Tag is just MP3Tag’s way of marking multiple separate values for a single tag. There is no actual double backslash stored in the file.

Picard’s genres will by default also be multiple distinct values. But you can choose to have them all as one value separated by some separation character in Options → Metadata → Genres → “Join multiple genres with”.