This is a good reminder of why #opensource software is so awesome.
Even if the author of an open source app/service discontinues it, anyone
can just fork the project and keep updating it.
When
it comes to closed source stuff like Google Podcasts here, you're at
the whim of the company shutting down a product at any point, and
there's nothing you can do about it.
Here's a great tool to find alternatives to Google products, make sure to set the "open source" filter!