Comment by dwaite

> It wasn't permitted for music apps until a few years later, by which time Apple Music was established.

My understanding - Siri is at its heart a command and control system. It was able to do Music (and iTunes before) because it knew The Who and The Rolling Stones from the hosted music catalog, even if those weren’t downloaded locally.

Apple needed to provide the localized commands, but also still needed the nouns to go with the verbs.

> Is it just that Spotify didn't bother implementing the relevant APIs or because those APIs were not available?

The former. There are plenty of other CarPlay media apps. They are all limited (first and third party) in that CarPlay is basically like a low bandwidth VNC display.