I've been having increasing problems even having messages properly make it through between XMPP and Hangouts clients lately. Sometimes I have to open up hangout

I've been having increasing problems even having messages properly make it through between XMPP and Hangouts clients lately. Sometimes I have to open up hangouts on my phone so my gtalk messages actually go through to another user. So I'm not sure it's clear that even the days of that interop aren't numbered as well.