It would be very good having pure onion address relays, because you don't need to exit on clear net. This is the culprit of most of the issues .. however i saw that everything stuck using onion net nostr relays .. probably most of the nostr implementation didn't work on that.. i saw big issues with

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for example basically nostr connect auth with amber didn't work onion relay good resources

GitHub

GitHub - 0xtrr/onion-service-nostr-relays: A list of nostr relays exposed as onion services

A list of nostr relays exposed as onion services. Contribute to 0xtrr/onion-service-nostr-relays development by creating an account on GitHub.