Show notes are vital for podcasts. Often, I will just skip over a podcast if the show notes are lacking. I just know they will say something interesting that I would never be able to get back to unless I listen through it again.

A lot of podcasts these days just add transcripts and leave it at that. Transcripts are better than nothing and probably good for the podcast producers for SEO or whatever but I don't find them all that useful. IMHO the show notes must have links for every broad topic, concept, person, book, project, conference talk mentioned.

The folks at Oxide Computer get this https://oxide.computer/podcast/