To further thicken the plot imo NSA and other TLAs are a red herring in a world where WhatsApp was acquired for ~20B. I don't believe for one sec that messaging app peddlers just want to make sure users' conversations are secure.
When WhatsApp was acquired, it didn't have meaningful cryptographic security. Facebook funded the integration of Signal protocol into WhatsApp after the acquisition. So there goes that theory.
Absolutely not. In fact, security was a differentiator for competing products when WhatsApp did not have it. Just not one people would care about. It fits nicely.
