FANS: I'm sure low fuel was a stress factor. Why do the CAA/ICAO allow us to carry such low fuel?
I have seen a real go-around handled badly. I know of a real EFATO where the gear wasn't brought up. These examples were both 'flown' by experienced captains, one of whom was a training captain.
In the days when we operated the B737-200 on the bucket and spade routes to the Canaries we were, more often than not, arriving at destination with minimum diversion fuel so there's nothing new in this and the go around was always manually flown.
Errors like omitting to retract the gear are usually caused by some form of distraction.