Technology

In practice the content is distributed to all the other servers, so people who have been reading it before will still be able to on their own instance, but you're right the indexed domain is gone and so are the results in Google.

But there is one difference, one instance of lemmy only stores a very small fraction of the content. And it's much easier to fuck up one reddit compared to fuck up thousands of lemmy instances simultaneously. So if one instance goes down, the rest of the fediverse is still up and running.