[time-brightcove not-tgx=”true”] On Monday, Elon Musk replaced Twitter’s blue bird logo with an X. Musk had teased the new logo over the weekend, tweeting: “soon we shall bid adieu to the twitter brand and, gradually, all the birds.” Many users are unimpressed. Musk likes the letter X—he named his space engineering company SpaceX and his AI company xAI, and when he was at PayPal, Musk unsuccessfully tried to have the company renamed to X-PayPal and include an X in the logo.