Amazon rolled out an automatic upgrade to its Alexa virtual assistant. Alexa+ has new voices and new features.

Why did Alexa’s voice change? Users say the new sound is jarring, emotional, and unexpected after Amazon’s latest update.

Las Vegas (CNN) — Amazon doesn’t just want Alexa to know you. It wants her to remember things about you, like a close friend or family member would. That’s the driving philosophy behind the vision for ...