I predict that for the next generation there will be no way to opt-out of Alexa.
Alexa will be embedded in everything with no way to disable it.
New car - Alexa automatically enabled
New cell phone - Alexa automatically enabled
New computer - Alexa automatically enabled
New television - Alexa automatically enabled
New home/apartment - Alexa automatically enabled
Eventually it will come to Alexa embedded in your refrigerator/new kitchen appliances/alarm clocks/washing machine/well...everything. I believe we will live to see this in our lifetime.
Then that will really be 24hr surveillance of everything you say, everywhere you go, everything you do. By correlating data from various sources associated with you, the NSA will know your wife is cheating and with whom before you do. They will know if you are about to get married or divorced. They will know if you are about to get a bonus or declare bankruptcy. They will know if you are getting a raise or getting fired at work. They will know everything about you life situation. And they will know it before you even have a clue what is about to happen.