"Now that they've added a block to ensure the software and firmware remain sync'd then nothing is disabled"
And while it's true that all things eventually lose support, things current in the range and bought last week absolutely mustn't lose critical security patch type support. That's madness, but that's what Sonos have done here. Anyone who bought a player just before the change will never receive the security updates to which they are entitled and to which they had a valid contract unless they agree to new contract terms. Illegal.