I've made an interesting discovery:
2 years ago, I created a tar.bz2: containing a files-in-folder: 0-Byte filesize, but ID3 music metadata fully available - stored in the filesystem attributes (#xattrs)

Now I've realized that I can use this #tar not only to browse media collections (#DAM) in a highly portable and accessible format, but also that I can /write/ attributes (and other filesystem/metadata) changes to this "#holotar".

Using this as UI to interact on a lightweight copy of any data.