Architectures are like archaeology; in essence, layers upon layers of systems, applications, databases, and connections, typically built or procured to solve a tactical problem.
Many corporations talk a good game and brag about the strategic long-term direction of the enterprise architecture that serves the business. The fact is, tactical needs have trumped strategic direction over the years. Thus, layers upon layers of technology on top of technology are the end result, and an architecture that is inflexible, static, fragile, and thus difficult to change along with the business requirements. This is the norm, not the exception.
