https://www.scuttlebutt.nz/ why do you need the ordering? you can just do it at the client-side or make specialized relays that enforce it at the specific kind-level. Why do you need it?

Secure Scuttlebutt. Older than Nostr, and truly peer-to-peer. No holes in the convo there... if anything is missing, the client cannot decrypt and verify subsequent replies. I firmly believe this is worse, and the Achilles Hell of an otherwise brilliant endeavour.