There referring to the people who claimed that Twitter would break down following the large scale firings. Every time Twitter went done for a little bit after that, lots of comments here would pop up claiming that the Twitter site would get worse and worse and eventually break apart because of the firings (see the whole discussion here[1], for example). People said Musk didn't know what he was doing, and wouldn't be able to keep the site up long term after the layoffs.

Despite the fact that these predictions ended up being completely wrong, there seems to have been very little reflection from the people who were making them.

[1] https://news.ycombinator.com/item?id=35043433