Re: "and they never get tired, irritable or distracted".
Lets hope the quality of code is better than the Toyota engine management unit:
http://betterembsw.blogspot.co.uk/2014/09/a-case-study-of-toyota-unintended.html
Read it an weep, or at least, not buy a Toyota.
However, who knows how well other suppliers would fair if properly audited. Eh, Ford with your engine stopping problem, or you Range Rover with your door unlocking?