4) A deliberate UX trade-off that, while clearly suboptimal for the kind of people who read HN, still leaves WhatsApp's massive base of everyday users in a much

4) A deliberate UX trade-off that, while clearly suboptimal for the kind of people who read HN, still leaves WhatsApp's massive base of everyday users in a much better position than they were prior to integrating the Signal protocol: immune to the more mundane threats of passive mass surveillance and the exfiltration of message history from Facebook's servers.