X CEO Linda Yaccarino says she's yet to see Elon Musk in 'demon mode'

"Demon mode" is described by Elon Musk's biographer as his highly productive but "dark" state marked by "a real lack of empathy."

https://www.businessinsider.com/linda-yaccarino-x-elon-musk-demon-mode-twitter-2023-9