Pardon my skepticism but how is this any better than r/podcasts/ - an existing community of ~2Mn+ people?
I can kinda see the logic - unfortunately sitting in front of my computer is my least favourite way to consume podcasts - and the workflow seems to break down quickly once you disassociate the two.
First, r/podcasts is for all podcasts, I'd be more interested in a community for a specific podcasts (say my favorite one: Dithering).
But also a r/dithering wouldn't really work that well since I might not be listening to a particular episode right when it came out. I'd prefer to talk to people about only the most recent episode I listened to.
Of course a r/dithering could simply have a meta post for each episode but that isn't that easy to find.