People saying they had to defederate to protect their privacy were always fucking dumb in thinking that affected anything anyway. There is practically no downside to federating that doesn't already exist eitherway. Although it matters more for mastodon than lemmy but the benefits of federating (more users, more content, more friends etc.) outweigh the negatives in my opinion.
In my opinion they do not. When considering the meta userbase we really should spend more time thinking about the quality of those potential new additions than the sheer quantity. Right now, many things that make typical social media so annoying and uninteresting to me are not notably present on the fediverse.
No overt narcissism, less tiktok content, less utterly mediocre people talking into their camera about the most average and uninteresting things imaginable. In comparison the culture here is friendly and nerdy. I don’t think it will be improved by a massive influx of shallow, vapid crap.
I for one have not been able to get any of my close friends into anything fedi. But instead they were the first ones to talk to me about threads and they've enjoyed it too. They've said very similar things to what I used to say about mastodon when I originally joined.
That's exciting in my opinion. I want the internet to go the way of all of these federated services and meta adopting it is a way towards that (no matter what you think of zucc and his company and morales) instead of it just being some weird gatekeepy little niche in the corner that I'm starting to see it as.
Blocking Meta has more to do with not playing nice in the first place. The concern is expansion of feature sets making other Lemmy instances/clients irrelevant the way google chat did with XMPP. Google put in features not compatible with XMPP clients, while it brought a lot of users on the protocol,, eventually everyone just moved to google clients. Not so much about privacy. If something is public, it is reachable.
That said, IMO the only way for that to work is if a great majority of instances block them.