It makes me sad to hear 'tech commentators' on RNZ talk about using WhatsApp rather than something better, like Signal, Matrix, or something XMPPy. It makes me question their credibility (certainly with regard to security & privacy!) if they look no further than the #FrightfulFive's offerings and accept the massive compromises their use requires. Makes them seem oblivious.
FYI Whatsapp was based on XMPP but with no federation
On the contrary they made it a secret