Just to be crystal clear about the goalposts: I said at the start of this chain that if somebody wants secure messaging, they should use Signal or WhatsApp.

You raised concerns about lack of source availability, and I’ve been consistent in my replies that source availability is not the way that somebody wants secure messaging is going to know they’re getting it. They’re going to get it because they’re using a popular platform with robust primitives, whose compiled/distributed apps receive constant scrutiny from security researchers.

Signal and WhatsApp are that. Concerns about Meta’s other work are just noise, in part because analysis of the WhatsApp distributed binaries doesn’t rely on promises from Meta.