On the planet I live on, Sonos does obnoxious tracking. There is no direct communication between client and speaker at all - everything calls/is routed via home. Moreover client on mobile requires and will refuse to run setup until you grant it precise location permissions. It's a spaghetti of strings attached.

Bose and other bluetooth speakers don't have any strings attached because:

* you don't have to be connected to the internet to use it

* you don't have to have account with them to use it

* you don't have to grant tracking permissions to use it

* manufacturer can decide to discontinue product or go bankrupt - it doesn't matter, you can still use product as you did before, you're unaffected

* you don't have to worry about software deprecation - new versions of sonos client for iOS require recent versions of Apple devices - you can't install client on older phones/tablets to use your speaker