It's hard for me to comprehend that there is much demand for AI generated podcasts or videos... I think what's happening is that AI Generated videos, photos, audio, etc are also getting a ton of bots to juice the algorithms so they seem popular, but I don't think anyone actually has legitimate interest in it. I don't think content will approach zero value, people will still pay to listen to Joe Rogan because it's Joe Rogan even if there are a million GenAI Joe Rogan copies.
Personally I think what'll happen is people really focus in on sources of information or entertainment they can trust. We visit your page on Hive because we trust that your words are your words.... as soon as it seems like your content is not your own I guarantee people will lose interest... the problem that I see is that people use Generative AI to trick advertisers and creators get less and less budget to support themselves with and stop... in which case GenAI has less data to consume until it's just generating outdated nonsense.
I'm sure you feel very vindicated at the people who laughed at you, all the predictions you listed seem pretty reasonable.