The reason censoring Nostr is difficult is that you have the option to save your messages to as many relays as you’d like, and apps will look for your friends’ messages in a bunch of relays at the same time.

William Casarin, the developer behind Damus, a popular iOS app for Nostr, says the platform’s interoperability pushes him to constantly innovate, because once his client no longer offers the best user experience on iPhones, people will move on to a better client.