Which may be a feature as far as most GTS and Snac users are concerned!
But I do want Threads to technically be able to federate with most/all other software that uses #ActivityPub, so it can be user/admin choice whether to accept connections from the giant instance...and more importantly, to cut down on the risks of vendor lock-in and EEE.
And I hope more compatible systems will cut down on the "OK, my software federates with itself and Mastodon, I'm done" problem. In some cases there may be bugs on the smaller project's side, and fixing them might also fix issues talking to other small projects.
If Facebook had an issue tracker for threads, someone could open an issue there. If threads was an open source project, we could look at the code and immediately know what's up, but... 🤷
This is interesting: In Snac, I can see a Threads post boosted via a Mastodon account. It's a post from a few days ago on the account I tried to follow earlier. And according to the timeline and API, I am following them from Snac. But they aren't showing up on the list of people I follow.
This suggests that Snac is able to interact with Threads posts, and is able to follow Threads accounts, but runs into trouble retrieving Threads profiles.
Partial federation is a more interesting problem IMO than no federation, so now I really want to take a look at the logs!