156 M C K I N S EY Q UA RT E R LY The AI Revolution In Software Development If gen AI has a killer application, it’s software development—one of the most profound shifts in the history of programming. BY C H A R L OT T E R E LY E A A N D M A R T I N H A R RYS S O N T I E R O / G E T T Y I M A G E S