I have a network design that fixes this problem (You can find a proof-of-concept here:

GitHub

GitHub - baumbit/treebit

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). The fix is easy: node-to-node (p2p, just like bitcoin) and content propagation is solved by #peercuration (https://github.com/baumbit/peercuration). The design even works in adhoc meshnetworks. And… good news everyone, its applicable to Nostr notes!!!