On what car do you _need_ the remote to enter and drive the car (having tow the only alternative to e.g. the remote battery dying)? In all cars I have used, you could just use the physical key if the remote failed.

My wife certainly doesn't know how to unlock and start the car without the "keyless" function. Every time the fob runs out of battery, she needs step by step instructions otherwise she's stuck there. She uses and sometimes programs SQL and API calls at work, but knows next to nothing about cars.