Sorry all. I'm very slow here. The linked story only talks about a group within Meta showing concern with concernable events. What was the event?

I'm slow because this article doesn't describe it: and believe it or not, I use this website as a source of "breaking" news, so I sincerely would like to know.

EDIT: ahh p2detar has something real: https://news.ycombinator.com/item?id=50248577