Amazon on Wednesday unveiled the first major overhaul of its Alexa voice assistant since its introduction more than a decade ago, embedding it with generative artificial intelligence. The effort carries significant weight at Amazon, which has plowed billions of dollars into Alexa since its launch in 2014 in the hope of putting the service into a range of devices and ultimately driving sales on its main e-commerce website. “Alexa knows almost every instrument in your life, your schedule, yo