Patreon (and to a greater extent, the podcasters I support) keep making real money out of me and millions of others every month for personalised RSS feeds for content. That RSS feed is the delivery vehicle. It's very reliable, I can use it in any app, much good, so benefit, wow.
I bet that most podcast listeners don't know what RSS is or how it impacts their ability to listen to podcasts.
Podcasts also present a different problem from most news. People want to listen to a podcast and know about episodes. A platform can't easily come in and alter the flow of episodes coming without consumers noticing and being annoyed. This works for RSS.
With other news the aggregating platforms want to manipulate the flow of information for their benefit. If I look at my home in Twitter I might see posts from hours or days ago at the top. It's about engagement and they manipulate the order and display of posts to aide that. Their business model doesn't fit well with RSS as a backing technology.
Note, I can't stand the manipulation of my news feed. I just understand the business and other factors behind it.
Off topic, but it's insane how Spotify insists on advertising podcasts to paying users. Worse, they advertise podcasts of American right wing extremists, and call it "Something you might like" or similar offensive wording. I'm not even American, and I'm subjected to unwanted foreign political content on my music player's home page.
I contacted their support about this, and apparently they are getting paid to advertise these podcasts to their already paying users.
Every major service integration (Spotify, iTunes, google Podcast, pocketcasts)
subscribes to an RSS feed. That's how it knows when a new episode is uploaded. Those MP3 assets are not hosted on Spotify, iTunes, etc, I host them on my own s3 bucket distributed with mp3 links in the RSS. I'm sure if your a really big podcaster like Joe Rogan things may be different, but everyone else uses RSS feeds
"Integrated centralized platforms" like anchor.fm etc just publishes an RSS feed to those same services and hosts the mp3s for you on an S3 bucket
Moving away from RSS doesn't solve anything