Threads doesn't have any of the magic that made Twitter popular in the first place.Twitter, Threads, Tyler Le/InsiderThreads, the newest social-media app from Meta, rocketed past 100 million users less than a week after it went live. The explosive start from Mark Zuckerberg's latest brainchild made it the fastest-growing app in history and took a significant bite out of Twitter's traffic, according to the tracking company Cloudflare.