“The reality is that Elon Musk is and always has been at the helm of X,” said Mike Proulx, research director at Forrester VP. “It was clear from the start that she was being set up to fail by a limited scope as the company’s chief executive. Her background and actual authority positioned her more as the company’s chief advertising officer, rather than its CEO.”
https://www.theguardian.com/technology/2025/jul/10/linda-yaccarino-resigns-x-elon-musk