your smartphone will not open your door during a power outage
Unless you live in Southern California (where the weather, it seems, only changes from warmer to cooler and back), you experience noreasters, tornados, hurricanes, floods, and other weather events that result in power outages. For your phone to open that door, the door lock has to be powered on. And for that you need an uninterrupted supply of power. All this cool technology being dreamed up in Silicon Valley and being dumped on us, takes no consideration of the real life. I will keep my good old door lock for now.