That's a fair point, and it's your call - however, if the new (major) development is covered in this way then 1) users on the front page won't see mention of it at headline level and 2) the discussion of that development on HN will be affected by/limited to the time-decay of a post that is 12 hours older. I understand that there are tradeoffs at play, it really comes down to if the development at hand is big-enough to justify another post, and, again, that's your call.
It's not my call, I'm just explaining how HN typically works. If you want some story handled differently, you should send an email to [email protected]. But 'two or more things about the same thing on the fp at the same time' is a big barrier to overcome, it almost never happens.
There is mod commentary on 'people might miss things because of the title' as well, it's mostly 'it's ok for people to click through the story or thread to figure things out' and that's also a fairly longstanding 'how HN works most of the time' thing.
I concur. An analysis of potential risks and vulnerabilities is a different beast from actual proof that the app has indeed been hacked. I call for the other discussion to be restored.
Edit: Wanted to respond to the top-level comment but you get the point.
