Last night Adam Mosseri, Head of Instagram, quitely announced the next step in the integration of Threads into the Fediverse. In addition to being able to follow Threads accounts from Fediverse/Mastodon accounts, we can now reply to and like Threads posts. Threads are taking a quiet, incremental approach to Federation, but seem genuinely commited.
From About Threads and the fediverse
If you turn on sharing to the fediverse, users on other servers can search for and follow your profile, view your posts, interact with your content, and share your content to anyone on or off their server. On Threads, you’ll be able to see the number of users on other servers who liked your post. You’ll also be able to see and like their replies to your post.
Facebook isn’t joining Lemmy. Lemmy is a weird ActivityPub server, it barely works with the rest of the Fediverse because of the design of the underlying protocol. They integrate with Mastodon and other timeline based social media first and foremost.
I personally like the ability to follow people who don’t know how to install Linux on Mastodon. Most servers will silence Threads anyway, so you’ll only see posts from people you follow or posts retooted by people you follow.
Based on what I’ve seen about ActivityPub’s growth, most people came to Mastodon to flee Twitter or to Lemmy/Kbin to flee Reddit. I don’t think any Facebook alternatives have really taken off.