Let's face it Meta likes control. Control over your data, control over what you can and can't say and control over nsfw. I don't see meta truly wanting to federate due to lack of control. We all know how they feel about nsfw content and any speech that goes against thier ridiculous algorithms. I expect them to federate with as many instances as they can and cherry pick data. I doubt you'll see half of the fediverse when viewing from threads.