Remember when some cars, GM vehicles specifically, required two different keys? The little round one unlocked the doors and the little square one started the engine.
Then technology grew to combine those two keys into one, so drivers no longer had to fumble with separate keys to gain access to their vehicles. Soon key fobs were invented and the door unlock key became altogether unnecessary as a simple push of a button handled all locking and unlocking functions.
Of course, for modern civilized humans, the act of inserting the key into the ignition and twisting it required far too much effort so the push-to-start button was invented. That gave drivers the convenience of never needing to remove their keys from their pockets.
What’s next in the evolution of car keys? Probably their complete disappearance.