Sonos: Some of our oldest products will no longer receive software updates
blog.sonos.com
blog.sonos.com
This happened to me with their change to a more cloud based model some time back, where I was not particularly in favor of accepting the new terms. But my phone had already auto-upgraded the Sonos app. And to also upgrade the speakers I was forced to first accept the new terms, else no access to the app which was needed to upgrade and control the speakers. Thereby they essentially forced users to accept the terms or accept owning a set of expensive door stops.