Alexa+ upgrade: Not just a voice assistant, but Amazon's ecosystem ticket

Alexa devices have surpassed 500 million in global cumulative sales, but user activity growth has been steadily declining over the past three years, with the smart speaker market shrinking overall. By turning Alexa+ into an AI agent capable of proactive shopping, food ordering, and ride-hailing, Amazon is essentially answering a life-or-death question: As large models redefine the boundaries of voice interaction, what will Amazon rely on to defend its entry point?