Yeah, the old protocol we're phasing out in favour of mutual TLS auth :) I should attempt to gather some stats from the XMPP network, but I suspect that since

Yeah, the old protocol we're phasing out in favour of mutual TLS auth :) I should attempt to gather some stats from the XMPP network, but I suspect that since Let's Encrypt made it easy to obtain certs, dialback is probably rarely used. We disable it entirely in Snikket and have had minimal complaints of interoperability issues with other servers.