The hot, new thing in social media is not really that new at all. And that’s kind of the point. The app Threads from Meta looks like a familiar blend of Twitter and Instagram. It’s attracted more than 100 million users in less than a week, pulling way ahead of Twitter alternatives like Mastodon or Bluesky, in large part because it’s part of an already established social media brand. You don’t have to start from scratch on Threads; just log in with your Instagram credentials and import all your follows with the push of a button. But there’s some baggage that comes along with that Insta network, said Shirin Ghaffary, a senior correspondent at Vox who covers social media. She talked about it with Marketplace’s Meghan McCarty Carino.