Using a microphone, even with an offline ML model, to do things like play music at the right times and (almost certainly) show you ads or ask if you want to buy Amazon product is pretty off-putting. Google Maps and Siri Suggestions uses your phone's behavioral data and location history to figure out when you usually leave for work, but if you said "i need to get to work an hour earlier tomorrow" to someone, it would be weird if your phone or Alexa instantly said "do you want me to remind you to leave earlier?" I don't think it's as off-putting as the article makes it out to be, but it's still pretty creepy; we're almost certainly going to have boomer facebook groups boycotting Alexa for "always listening".