@AntennaPod @podverse @liaizon @trashheap @semitones @benjaminbellamy There is a project to use ActivityStreams and publish this user generated data using ActivityPub across all apps. IMHO OPML is not the way forward. In Podcasting 2.0 Podrolls, Playlists and Publisher Feeds are using the RemoteItem structure as a means to list podcasts and episodes in an interchangeable open format which replaces OPML for import/export. But W3C ActivityStreams will be the best way to all app interoperability.