> I'm done with Sonos after they removed the ability to play music straight off the phone onto the speakers.

Did they ever support this? They don't have built in Bluetooth, and I think they only talk NFS and Samba(?) for audio servers.

The other integrations over UPnP/SOAP (IIRC) are for sending it audio URLs or instructions to play Spotify, Google Play, etc.

Some of these pieces might have been pulled out with recent API updates?

I don't have firm details, only forum hearsay, and I'd love to find out what's actually going on with Sonos' APIs.