david_megginson, … That's not quite true with light piston twins, many of which can barely hold altitude with one engine out, and which demand a quick reaction and very good-pilot technique.
The grim pilot joke about piston twins is that the second engine is there to take you to the scene of the accident — until a few years ago, they had a much-higher fatal accident rate than piston singles, but that has been improving with better training and more awareness of the limitations.