And encryption, which is an addon and not the default. Also, XMPP is a good example of a 'victim' of embrace, extend, extinguish. I remember Facebook messenger

And encryption, which is an addon and not the default. Also, XMPP is a good example of a 'victim' of embrace, extend, extinguish. I remember Facebook messenger, hyves chat, Google talk and briefly even WhatsApp, all in my desktop chat app. They all 'did' XMPP, but then removed federation, features or killed it entirely.