[CuriousCosmic]

There's some collaboration features. You can create "keeshares" between multiple separate databases. All the databases can append, update, or read the share.

You can't delete an entry but you can deprecate it and stop updating it (it's not actually feasible to revoke access anyways).

[scrollaway]

Keeshares seem new, I hadn't heard about them. Seems… interesting. Thanks for pointing them out.