You know, the stuff that the customer cares about. Yes, structured programming techniques don't really improve correctness, maintainability, usability or performance. But the real problem with the structured programming movement is that so many programmer believe in it. They believe that by following these techniques, they will produce good programs. It just isn't so.
Programming is much harder than that.
The RISK is that these programmers initiate projects based on the belief that structured programming is the atomic bomb of the software war. When the structured programming techniques fail to make the problem easier, and the programmers are confronted with the grim reality of how incredibly much work it takes to make the project succeed, the project usually fails. Occasionally, there are enough resources on the project that if the programmers put in enough all night work sessions, they can just barely get the project out before somebody pulls the plug on the whole thing. Usually, during this exercise, structured programming takes a back seat to getting the project finished. This is how successful software projects happen.