My takeaways:

Mosseri says that the Threads team wants to make it so the option to follow a Threads account on other platforms is available to “all public accounts on Threads, not just a handful of testers.”

You can only follow other threads accounts?

At the moment, he says the team plans to require accounts to be public and that users “explicitly opt in” to showing their posts on other federated servers. But the team is still considering making this the default, with the choice to opt out, instead.

They’re planning on using the fediverse content and server space without providing any.

The Threads team wants to let replies from other platforms show up inside of Threads. “It’s a bad experience now that I have to leave the Threads app to see replies I’m getting from the broader community,”

It’s the content they want the most, this makes it clear if you have to leave their app to reply to someone on another instance. We’re the zoo.

This is a key one: follower portability. “Eventually, it should also be possible to enable creators to leave Threads and take their followers with them to another app / server,” Mosseri writes. “I believe that it’s important that creators own their relationship with their audience.”

The bolded words makes me think that they’re not going to do any of that, lol

Please instance owners, don’t wait and see.