Why should that be outdated? The #[n] syntax is nicely concise and allows every client to use whatever format they want for a reference.

>From: vitorpamplona<-De... at 04/22/23 18:52:31 on wss://atlas.nostr.land

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>#[] references are technically outdated. They should write nostr:nevent / nostr:nprofile / nostr:naddr instead