https://www.theguardian.com/technology/2023/jul/24/x-marks-the-spot-elon-musk-isnt-alone-in-loving-24th-letter-of-the-alphabet

From The X-Files to X-Men, Xbox to Xerox, X is loved by brands in tech, media, music and more

Elon Musk has replaced Twitter’s longstanding bluebird logo with an “X”, reflecting the company’s new name of X Holdings Corp and his vision of creating “X, the everything app”.