[jedberg]

Most of the old apps can't be updated, so they are sort of frozen in time. They all hit APIs on the backend, so as long as the APIs they hit remain backwards compatible it "just works". The old apps don't get any new features that require UI changes or can't be supported on the platform if that platform is updateable.

So the short answer is, everything is an API, so as long as the API stays backwards compatible it just works.

[arvinaminpour]

Gotcha I thought that it might have been server driven clients similar to the way Spotify does it. But that makes sense :)