There are vehicles that have those features. Back before I retired as a medic, the new ambulance we got had that feature from Ford, (Ford makes 90% of all certified ambulance chassis in the US). It was quite disconcerting to hear the engine shutdown and restart by itself.

I was less than impressed by it because of all the electrical devices and lights we constantly run. If it fails to restart and the batteries are dead, someone else might be also.