Yes. They can be stored elsewhere with no downside. Storing them on chain is like carving the history of france into the Eiffel Tower. It's good to have written somewhere, but why there?
Discussion
Permanence and availability. Same reason we record our ledger entries on the chain.
Yeah centralized availability is not smart, which is my point. Nostr isn't a single chain, highly available and permanent (if enough nodes persist) why not use that?
Immuteability. Same reason we publish to the chain. No take backs.
And your Nostr relay is muteable how...?
Jb55 has nuked the Damus relay at least once.
*your* relay. Mempool.space could nuke theirs too.
I could delete my relay? Or remove events? Immuteable means it can't change.
This is true of Bitcoin as well, man. You you broadcast a note to yourself it's like running the only node on the BTC network, you could make a transaction then reorg yourself. This is apple to apples here. Then bitcoin is not "immutable" either.