https://podcastindex.org is building a lot of infrastructure for "Podcasting 2.0" and it all centers around RSS. I've been following this and if you find RSS interesting this will be great to check out.

This is their podcast where they talk about what they are doing; https://podcastindex.org/podcast/920666 That podcast RSS feed; http://mp3s.nashownotes.com/pc20rss.xml

They also have their own mastadon where all the developers working on Podcasting 2.0 hang out. https://podcastindex.social/web/home