Actually I think illuminated manuscripts had more value, insofar as they were art, than podcasts (99% of which are vapid timewasters and/or friend simulators.) The good podcasts are those view which involve interviewing interesting people, and AI isn't replacing those.

There's a lot more to be said for the value of audio books, but the accessibility gains of proliferated auto-generated audiobooks outweigh the downside of losing a small number of expertly produced audio books.

For context, I listen to audio books a lot, and for years I have listened to traditional TTS readings of books too. Better voice generation for books without audiobooks is a great win for society.