Last time they touched an open chat protocol, they hung it out to dry. That was XMPP. That's why more than half of the fediverse is reluctant or outright hostile to federate with anything meta.
XMPP is used in many, many places. It's just not usually explicitly known that the backend is using that protocol
You are underplaying the damage Google and FB did to XMPP. It wasn't supposed to be relegated to an obscure backend protocol. The involvement of those companies ensured that it didn't become a popular user-facing protocol.
Last time they touched an open chat protocol, they hung it out to dry. That was XMPP. That's why more than half of the fediverse is reluctant or outright hostile to federate with anything meta.
XMPP is used in many, many places. It's just not usually explicitly known that the backend is using that protocol
You are underplaying the damage Google and FB did to XMPP. It wasn't supposed to be relegated to an obscure backend protocol. The involvement of those companies ensured that it didn't become a popular user-facing protocol.