I’m pretty sure they are going to do the opposite, support server-to-server, and never support client-to-server. They have been meeting with the maintainers of Mastodon and admins of large instances. Their stated goal is to allow migration off without losing your social graph (this is obviously a lie about motivation, but that’s not what I’m taking about here). This is all about server-to-server implementation.

So, they are going to be part of the server-to-server Fediverse, and keep all of the juicy app data from Threads users to themselves.