For example, if Alice creates a group, she can act as the admin without a need for consensus; coordinating messages can be distributed across several relays. No?

The reliability of message delivery of commit messages is the main difficulty, even in the case of a single admin?

A structured network strategy to sync Nostr relays I think can greatly help the persistance and reliability of messages. Negentropy is a huge help. For example, if all admins independently run relays and have write policies exclusive to members/admins, the relays can sync and secure only those messages between each other. Strfry has some support here with a router. However, last I remember, the features were new and could be optimized. I would need to look again.

Yes, and now do this with relays on the phone and fips connection between them, cypherpunk future is now.