But on the other hand, on modern cars that is not nearly enough to get the car started. As OP pointed out, Simos18 was quite conveniently hacked, but that's far

But on the other hand, on modern cars that is not nearly enough to get the car started. As OP pointed out, Simos18 was quite conveniently hacked, but that's far from the only ecu family. And usually they aren't hacked as easly/quickly. For example, all that Simos18 "easy" hacking can be done once you have IGN ON, if you have IGN ON it's probably easier to just code a new set of keys, than it is to flash new FW on all related and needed computers.