Comment 8 for bug 1743699

Re Be "use a custom JSON format to serialize/deserialize arbitrary, user-defined faceted tags. This is much more flexible than the limitations of standardized tags such as genre."
All for flexibility - if it allows data serialization from, as well as back into standard & custom tags (across a variety of formats) as well.
i.e. not the Pioneer route of database tags that lock users in, and can not be stored within files, in order to stay as software agnostic as possible...
c.