I’m in the middle of moving No Strings completely over the nostr. Already hosting the audio files with nostr.build. And made them available on zapstr.live.
Next I’m thinking of using long form posts, NIP-23, to publish the episode and its important metadata. NIP-33 would allow me to update a published episode.
Then I would have a client that looks for newly published notes and generates the new RSS feed and publishes it for podcast services to ingest.