Now me... I know someone personally who was a senior exec for Twitter's software team, who left after Elon's purge.
He left because all the people who understood the system and could predict the side effects were fired or left. He'd been with companies going through death spirals before, and had no interest in being involved with another one.
So, while the person you're replying to might not know, my friend DOES know.
However, even with my limited experience in similar scenarios on smaller scale - it still feels accurate.
It’s a mistake to stay.
They were just summarily fired.