It might be a small thing to take a principled stance on, given all the bigger things going on in the world, but I've never listened to podcass on Spotify or any other platform that has exclusiev podcasts without an RSS feed. Because to me the fact that they use an open standard, RSS, is an intrinsic characteristic of podcasts, and anything that doesn't, shouldn't be allowed to call itself a podcast.
Yeah without the RSS nature of podcasts, anything else is a proprietary audiobook basically.