It’s may be bigfed than NIP-65 one day… but NIP-65 is the first iteration of this spirit / outbox model that could at least get clients prepared for the style of rapidly switching between connections.
Good strategy may be to read from the clients you write to first (read from the relays you’re currently writing to), then if there’s no response for the note hash you requested — query the NIP-65 note & connect to a new relay to retrieve the missing note.
This way it avoids the attack vectors nostr:npub1xtscya34g58tk0z605fvr788k263gsu6cy9x0mhnm87echrgufzsevkk5s is concerned about by making it the primary model, while providing a back-up means of discovering missing notes & getting NIP-65 integrated sooner than later. Thoughts?
nostr:note1ypm4g4vzhkyf6umdj2nklqxlvs4jyv3f55th5kzk2k8ac23633hsmm5wvv