I feel like the Facebook Messenger XMPP support is a better example -- but it's hard to find any reference to it remaining outside of the internet archive. Eve

I feel like the Facebook Messenger XMPP support is a better example -- but it's hard to find any reference to it remaining outside of the internet archive. Even this old HN thread about its death leads to a dead end (https://news.ycombinator.com/item?id=9266769 https://news.ycombinator.com/item?id=9266769). 8 years doesn't feel like long enough for this extremely relevant example of Facebook closing support for an open protocol to have vanished.