If you are still looking for an alternative, https://lemmy.zip/ is a solid choice. Similar moderation policy than lemm.ee.
Monthly reports: https://lemmy.zip/post/39959863
Lots of lemm.ee users moving there: https://lemmy.zip/post/40323214
If you are in the UK (where lemmy.zip is geoblocked due to UK laws), https://feddit.uk/ is a good option.
You can export your subscriptions, blocks and saves from “Settings - Import/Export settings” and then import them on your new account.
Incorrect, that content is mirrored to any of the instances that federated with Lemm.ee and will continue to be accessible; although if you interact with any of it after Lemm.ee is gone, that interaction (vote, comment) will only be visible on the instance on which you did it.
If instances A B C are online and federated when you post, then A B C have copies of the data
Let’s say A shuts down and you move to a new instance D
Only B and C have your old content. D has none of your data. There is no backfill mechanism
If in the future B and C go offline (eventually they will) then the data is gone. Maybe in a archive.org snapshot.
Even in the future if D E F G still are going strong and Lemmy is thriving all the content that only A B C saw is gone. It’s a bitrot problem