What amazes me, getting back to the 'leaving the ac controls unmanned' discussion, is that the same people that tell us we don't need to fly around with 2 engines because reliability is so good, are the same people that tell us they can't shut down because they might not be able to start up again !
I doubt it if there any stats for failed starts but my impression, no more, is that they are more common than failures in flight.
FL