@evan Yes and no. The mid- to long-term plan is to add private group chats to a Web chat client of ours. So I'm a bit more interested in MLS over XMPP, and I'm following work for MLS over Nostr, which are both good bases for private group messaging, because users of those protocols already have key pairs and encryption for 1:1 chats in place. Also, the client currently only does XMPP and IRC.
But I want to follow the AP work on it, too, because it could be added to the same chat client as well.