I don't think they've sunk $1 into that idea. They've sunk billions into a different idea: that people enjoy using their vocal cords more than their hands to co

I don't think they've sunk $1 into that idea. They've sunk billions into a different idea: that people enjoy using their vocal cords more than their hands to compose messages to send to each other. That is not a spoken conversation, it's just correspondence with voice input/output options.