Fast forward to some point in the future, when level 5 autonomy is widely available. And people are using cars as a service (CaaS). How will the car you summon to take you somewhere know you are the "authorized" user? Will you have an ability to restart the car if for some reason it turns off during your trip. Presumably the technology to do this will happen at some point...because it will be needed. So eventually you won't need keys to "start/drive." For now, agree with others, it's silly to go w/o them. Just another perspective..