That universal protocol I was talking about seems to be mostly #AMQP.

However, it doesn't seem to have its own way to start new direct TCP connections to new servers/instances.

So perhaps I could build something like a lightweight #ActivityPub successor on top of #AMQP.

The main features I wish to see would be:
- #AccountMigration and #AccountRenaming
- #SubAccounts (kinda like #GooglePlus's circles)
- #Multilingual messages and hashtags
- #DigitalSignatures