Meta threads will open federation to the fediverse soon, and while this is mainly to mastodon it will still affect lemmy. They are acting like they won’t be evil, but let’s be real this is Facebook when have they ever done that.
This article which has been trending lately explains some of the issues. https://ploum.net/2023-06-23-how-to-kill-decentralised-networks.html
This comment here is a simple analogy if you can’t be bothered reading the article. https://lemmy.ca/comment/5702922
I would see it as the fediverse being like the UN and Threads being like America. The UN can say whatever they want about their rules and America will and do ignore them due to their size, influence and power.