Digital is convenient but not always right. Soon you will hear of stuff like your car got hacked, and your driving routes have been leaked, and your car keys got ransomeware and won't start unless you pay someone in an unknown country in Asia to make it work again.
Not everything should be digital or online.
All of that has nothing to do with keys. Many cars already have WiFi / LTE. Conceivably, software could be side loaded to exploit the systems already in place.