Mature software systems start as clean, carefully crafted architectural solutions founded on the best modern design techniques and good intentions. Over time, however, the purity of the architectural lines gives way to the practical reality of ad hoc extensions that, for the sake of business expediency, are hastily added to the core system structure. There’s nothing wrong with this; after all, in the real world, IT systems are built to perform requisite business functions and not necessarily to delight the aesthetical sensibilities of their software architects.
Quelle: Batch Optimization Using Graphic JCL IDEs | Enterprise Systems Media