That's great if you stay on top of the news, see it coming and get your data out of the way before the compromised app is pushed to your phone. Maybe habitual HN users are safe, but I think most Signal users would be compromised like this.
What’s wrong with the existing signal? This is not a sarcastic question. I’m actually curious what the privacy concern over signal is and what is meant by “the facebookified version” and what the privacy concern therein is. The new “stories” functionality I’m guessing? I haven’t used it so I’m interested what observations there are there…
In the hypothetical above, it contains malware which is exfiltrating message content before encrypting it for send.
As for the real world... nothing. I quite like signal.