Friction. Mastodon has a lot of it, and Threads has almost none. Also Mastodon did attract many technical users who stayed on it. Twitter's death was always go

Friction. Mastodon has a lot of it, and Threads has almost none. Also Mastodon did attract many technical users who stayed on it. Twitter's death was always going to be death by thousands of papercuts. But Threads is a legit knife to the heart. As a closed-source centralized platform they can innovate quickly and address user concerns, something Mastodon can't do.