It's a feature indeed. #archivability There still an option on some clients to delete the message so if someone is connected to just a single or two private/public relays it might get removed before it goes out everywhere. Some small communities out there can operate in a complete dark mode, with encrypted messages only and private relays.. Bitcoin is a messaging system too, with perfect tradeoffs the monetary application is the best utility, not a storage imho, wyt? Nostr goes much beyond the social media, it is just the most popular application of this protocol at this stage. Where do you think it can take us a few years from today?