If, like me, you specifically do not want third parties inside the Apple ecosystem, Apple has done a great job. I totally hate the EU's insistence of tearing down Apple's walled garden. That is a huge reason I like their products so much.
Interoperability only requires Apple to allow third parties to have the same capabilities that Apple does on your device. It doesn't require you to purchase or use a third party service or device. It merely allows you to have that choice in the first place.