Twelve years ago Moto X was launched by Motorola, at that time controlled by Google. I had it and at any moment you could say "Hello Google, what time is it?" and it responded. I was constantly listening. All the time. And it was a perfectly normal phone regarding battery life or data usage. TWELVE years ago, imagine how much easier would be to implement that now, with more powerful and efficient chips and bigger batteries.

From an article about Moto X back then: "If you want to take a selfie, you should be able to simply say “Take a selfie!” In short, your smartphone should live up to its name. That’s the goal with the Moto Voice and Moto Assist software integrated into the second generation Moto X smartphone. And to do that, the Moto X is always listening, for verbal commands from the user and also ambient cues of the context. That emergent behavior is spawned by complex interactions between the software and hardware"

Only much latter I came to the conclusion that with Moto X Google was making its first tests on using the microphone for mass surveillance.