XMPP have a lot of problems:<p>- Every server support different extensions. Extreemly fragmented.<p>- No reliable file transfer<p>- No reliable cross device sync<p>- Almost all clients are junky<p>- OTR and GPG are not the best crypto, but more trusted one as it is old and simple. Axolotl Ratchet beat them in every part.<p>This problems lead us to make messaging (actor.im) from scratch.