Two thoughts:

1. So there's a bit of talk about Threads being a mastodon/microblogging type platform and so it doesn't matter. This is somewhat wrong. Lemmy federates in a certain way with microblogging platforms such that two-way communication can and does occur between such platforms. However likely it is, when Threads turns on their federation they will be able to subscribe/follow and post to lemmy communities.
2. Picking a server/instance on the basis of its moderations issues is basically the first idea or utility behind decentralisation. So ... umm ... continue on your merry way ... this is the point. I know lemmy.ml has definitely defederated already.