@ipg @esm @mtr xmpp is still used in a lot of party-related operations, actually (basically everything clientbound)! yes, they don't use the MUC as much as they used to (system notifications don't go through there anymore since s4/s5), but everything else is largely the same. the extra stomp protocol they use with EOS does exist, but fortnite doesn't actually use it, and stomp just echoes a lot of stuff xmpp normally would (except it filters out extra stuff)