I am sincerely curious and maybe a Sonos owner can offer some feedback. what does Sonos offer me now that a streaming music provider, a smart phone and a portable bluetooth speaker doesn't? I understand that Sonos can stream to multiple "zones" simultaneously but besides the occasion of a house party how often is this necessary? This news to me is just another reason for me to never buy one.
Sonos keeps playing if your phone moves which is a pretty huge plus, especially if you know people and don't lead a life of solitude. Their hardware also has a wealth of hardware features like analog and digital inputs, zero-delay input monitoring which makes them suitable as TV or computer speakers, the ability to monitor those inputs from any zone, even if you aren't listening to them on the physically attached player, phase-locked multichannel playback, a zero-config self-extending wireless network, multiuser queue management, and twelve years of flawless software support (so far).
The idea that you get the same thing from a raspberry pi, an android, and some hacks is strictly for those valuing their own time at zero.