Twitter CEO Jack Dorsey appeared on The Today Show on Friday to celebrate the company's 10 anniversary. While there, Dorsey confirmed to host Matt Lauer that Twitter's 140-character limit will not be expanded to 10,000 characters, as he had previously suggested. "It's staying. It's a good constraint for us," Dorsey said. "It allows for of-the-moment brevity." Of course, Dorsey also once said Twitter "never planned to reorder timelines next week," just days before announcing the new algorithmic timeline that's now rolling out for everyone.