The banks that finance cars find them convenient as well; years ago there was a TV show about repo men, and so much centered around obtaining the key(s) from the borrower in default (probably to minimize the damage to the car in transport). In this economy, where gas stations have changed their signs to digital to reflect the economic instability (a scary trend), many car buyers will default as we continue to bleed jobs. Instead of having the repo guy beg you for your keys, he’ll already have the ability to take the car without it/them.
The only problem with that is that I pay my bills on time. So there would never be a situation where somebody repossesses my vehicle.