That precarious bridge is held together by nothing but legacy code and prayers. You know deep in your soul that removing those 200 lines of commented-out spaghetti from 2012 will somehow cause the entire production system to implode, despite all logic suggesting otherwise.
The best part? Six months later, you'll finally get the courage to delete it, only to discover that three critical functions were actually referencing a variable buried in there. Classic software engineering - where superstition is just another design pattern.