The Idea of a real key (physical one) has been around so long because......... it works.

Digital security much newer, and still tends to have floors in it! It has the potential to be better, but physical security is essential.

The only real defense is a tracker otherwise you low loader it, then connect the device directly to the wires bypassing the obd port away from the place it was nicked! (you don't care if the alarm goes off then! push start = push steal.

The cars made up to this time required a real key as well as a transponder. Both had to work.