X CEO Linda Yaccarino said she’s stepping down after two bumpy years running Elon Musk’s social media platform. Yaccarino posted a positive message Wednesday about her tenure at the company formerly known as Twitter and said “the best is yet to come as X enters a new chapter with” Musk’s artificial intelligence company xAI, maker of the chatbot Grok. She did not say why she is leaving. Musk responded to Yaccarino’s announcement with his own 5-word statement on X: “Thank you for your...