Meta’s new text-based social app Threads has quickly gained 100 million users since launching last week, which appears to be negatively impacting traffic on Twitter. According to web analytics, Twitter traffic declined 5-11% over the first two days Threads was available compared to the previous week. Threads was able to grow rapidly by allowing users to sign up with their existing Instagram accounts and bring over some of their followers. However, Threads has not yet launched in Europe due to regulatory issues. The fast growth of Threads may solidify its position as a real competitor to Twitter, which has over 238 million daily active users.
I don’t think it should be two accounts because that will break interoperability between Threads and Instagram. But having said that I agree that you should be able to disable/opt-out Threads with your IG account.
When you first sign up into Threads it will ask you if you want to follow everyone you follow on Instagram. This will allow you to follow people that are already on Threads and it will automatically follow the people that will sign up for Threads later. But you can’t tag people that haven’t signed up for Threads yet. So it’s definitely opt-in but it has a discoverability mechanic built in to make it easier for you to find people + potentially follow people that may sign up in the future.