FYI Whatsapp was based on XMPP but with no federation
I know, that was just another example of EEE
@post fwiw, as I understand it WhatsApp is largely identical to Signal (written by the same dev), except the former's been messed with by FB since their acquisition, and the latter probably has some of the shortcomings of pre-FB WhatsApp fixed... Not surprised if both have XMPP in their lineage.
On the contrary they made it a secret
@post sure, but with FB's full monitoring, even though it's claimed to be E2EE... because, don't forget, in addition to the middle, they control both ends too. Can't have a surveillance capitalist business model without building surveillance into your flagship products.