There was a case a few years ago when a destroyer, as I recall, was brought to a full dead in the water halt for one hour because a zero had been entered in the wrong place in the engine control computer screen by a stressed ensign. It crashed the system. If that had been a combat situation it would have been tragic.
I hope they'll build a few at a time so they can get more of the bugs out. It probably is the way to go in the long run.
It was running Windows NT I believe ;-p