tcp/ip, http, and bittorrent don't worry about retention, and neither should the nostr: protocol. This isn't a "social" protocol (though many use nostr for social sharing). #nostr is a portable-identity decentralized everything protocol, and the best is yet to come.

nostr:nevent1qvzqqqqqqypzqvhpsfmr23gwhv795lgjc8uw0v44z3pe4sg2vlh08k0an3wx3cj9qyfhwumn8ghj7mmxve3ksctfdch8qatz9uq3wamnwvaz7tmzd96xxmmfdejhytnnda3kjctv9uqzqazjxwwxf4klx778pawczv0ahhcvecuu45w7u97sputq07lgpfmlds9ru2