>In fact, the simplicity of the older systems usually lead to greater stability. Remember when that control tower in Chicago got attacked by some crazed employ

>In fact, the simplicity of the older systems usually lead to greater stability. Remember when that control tower in Chicago got attacked by some crazed employee? Do you know why there isn't just a simple DR switch over? Because the system is so antiquated, something like that is too problematic to implement. Thus all the cancelled flights for a week at the world's busiest airport. >ESPECIALLY when people's lives are on the line. Its more risky to have a pig with lipstick system run by COBOL graybeards one foot in the grave than to run things properly in a modern system with modern redundancy and modern features. Last I heard, the code that runs many of these systems is non-auditable because its just a pile of spaghetti code on top of spaghetti code. Its "works" in the same way an 80 year lady on her third hip can "walk."