Originally Posted by superswiss

Yes, we strayed a bit from the topic. The digital key for cars IS the backup. The key fob is the primary means to unlock/lock/operate the car and the digital key is the backup for when you locked in your key, forgot/lost it, don't want to carry the physical key, or you want to temporally let somebody else borrow the car w/o having to give them the physical key fob. Digital keys are rarely the only means to unlock something. They are mostly complementary for convenience. Keep an open mind. I stay at Hiltons often and one reason is their digital key. I can check in the day before and then just go straight to the room once I arrive. They still hand out the traditional badge keys as a backup and I usually get one the next day. Often the digital key doesn't work for the front door after hours for example. It's ultimately about convenience.