Why Amazon, Google and Apple want to record you

Every person who brings a new Echo speaker from Amazon into their home gets automatically recorded every time they utter the "Alexa" wake word. That is, unless they mute the microphone on the device itself. Or diligently go to the Alexa smartphone app, to manually delete the recordings. Amazon could offer the option of not recording us, but it doesn't. And it will tell you every way but Tuesday how important the recordings are to "improve" the Alexa experience.