Wouldn’t you have to trust WhatsApp to do the right thing too, as far as end to end encryption is concerned? How would anyone know if the original Signal E2E is still around or changes have been made to it? WhatsApp already collects, stores and shares more metadata than Signal does. Are there any audit reports from trustworthy parties on WhatsApp behaving as expected on encryption? Or are we just relying on someone working on WhatsApp to become a whistleblower?