I don’t understand how ActivityPub works that well and I haven’t used Threads so maybe I just doing get it.
But why would we have to worry about defederating Threads when it’s a Twitter clone? It doesn’t have communities and such so I would think it’s not compatible. We’re not federated with Mastodon instances right? This seems like something for Mastodon to worry about. How is a Lemmy instance refusing to federate with Threads relevant?
Why bother implementing a federated protocol if the intent is not to federate?
Don't you think Facebook/Instagram/WhatsApp has the experience to build a social media network without implementing ActivityPub? If federation is not a goal, why constrain yourself to building something that fits into that network?