Because it's a canned DEMO !
Still nothing new, nothing that hasn't been around for quite a few years there Jon.
Why are you so impressed with it now, all of a sudden?
You do know this is nothing new, right?
You never used a real CAD/CAM system where the model (CAD) and machining (CAM) is associative?
Think CAD/CAM Jon, associative, feature recognition, it's been around for years. Where you been, thought you were an expert?
As an expert you make quite a few beginner mistakes Jon. Like calling GibbsCAM a CADCAM program. GibbsCAM is a CAM program NOT a CAD/CAM program, you should know that.