https://arstechnica.com/gadgets/2020/02/apple-is-considering-letting-users-change-default-email-browser-music-apps-in-ios/

Apple is seriously considering the possibility of allowing users to change the default apps for Web browsing, mail, or music on their iPhones. The company might also allow users to listen to Spotify or other music streaming services besides Apple Music via Siri on the iPhone or on the HomePod smart speaker.