@djsumdog @signalapp SimpleX is like Signal without ID's, and you can pick your relay like NOSTR. You aren't bound to an official server to transmit your messages.
Session is just Signal on a blockchain. You have a random hash as a public key instead of using your phone number.
Neither are bad ideas, in theory they're slight improvements on Signal, but in practice neither work as well bc they don't have the same resources, and the minor improvements aren't worth it when Signal is already great.