Shameless plug(in) -- While not built-in, Relay [0] is a plugin that makes Obsidian multiplayer. Our broader goal is to make Obsidian great for work.

You can make individual folders collaborative in your vault with several different parties. We use yjs CRDTs for real-time collaboration, and we're making the collaboration server (optionally) self-hosted.

Check it out :)

[0] https://system3.md/relay

Also for enterprises, being able to point to a different plugins source through config would be great. At work we're mirroring many things using JFrog Artifactory, giving us control and oversight