I'm not sure if this is a joke about old keys being better, but I'd argue you could have the benefits of new keys and old keys combined if you just made it so that new keys have to be inserted into some compartment inside of cars, where they are authenticated by those cars. You can imagine a fob with a USB that has a different authentication code than the wireless one it sends out, and unless the USB is plugged into the car, you can only start the car up but you can't drive it.
In addition, you can make it so that the car doesn't unlock due to proximity with the fob, but rather, it only unlocks if you push the unlock button on the fob.
In addition, you can make it so that the car doesn't unlock due to proximity with the fob, but rather, it only unlocks if you push the unlock button on the fob.