Can you honestly believe that an organization can continue working with 3/4 of its stuff gone?
Hell, there are projects with a bus factor of one beneath all of our infrastructure (insert relevant xkcd here), and those are much simpler than such a monstrosity like twitter.
Every single time they've continued tweeting with exactly the same frequency.
I also suspect they were a pretty bloated organisation and they needed to change things radically.
It will ruffle a lot of Elon hating feathers, but Twitter is going nowhere.