This paper talks about what happens when top relays fail at the same time among other things that are very interesting regarding Nostr.
Exploring the Nostr Ecosystem: A Study of Decentralization and Resilience. .pdf
TLDR: Top 30 relays may go away and still 95% of the posts are still there. It says Nostr is better than Fediverse in terms of decentralization.
@fiatjaf @Mazin
