That's right. And if users want push notifications or search and you say "that's not possible, because every podcast is an RSS feed"... You have not explained a

That's right. And if users want push notifications or search and you say "that's not possible, because every podcast is an RSS feed"... You have not explained anything, you have not satisfied them with an explanation, and you are ultimately wrong about it being impossible. It's an implementation detail not a feature, and if it started getting in the way of what users need podcasts to do, we would change it not hide behind it. Just like there's no reason for one account per domain other than "that's what we went with for now".