@aaronpk @Gargron I think Aaron's point is key - it's layering a social network on top of audio, giving a richer experience than just text, but not as heavy an experience as video (in a time when we're all sick of endless zoom calls).
Ben Thompson had an interesting piece on his Stratechery site about the rise of Clubhouse and others in "social audio": https://stratechery.com/2021/clubhouses-inevitability/
His main point being that these tools are making it even easier to discover, listen, and participate.