As already noted in the thread on our being defederated by lemmy.world, we are now refederated for the time-being. However, as noted by one of the l.w admins if there are any spamming issues we'll be back out again and if the upgrades stop we will have trouble with federation (lemmy.one is still not on the latest version, while we are), so there is still a need to sort this out.
Instances becoming too big like lemmy.world has is a danger to the lemmyverse.
You post this on a neglected instance, ironically a good example on why it is important to make sure the instance you want to have an account or community on has enough active staff. Everyone can start an instance but keeping it up is no small feat.