Most IT landscapes of larger companies consist of hundreds of applications that are interconnected via poorly designed interfaces. In most companies, these IT landscapes already have an enormous technical debt (see Bob Martin’s Blog), i.e., an ‘unnecessary complexity’. In my experience, a company typically runs between 80% and 90% more IT applications (and therefore also servers, databases, networks, costs) compared to what would be needed if it had implemented the ideal architecture. A tremendous waste of money and resources, and the reason why IT is perceived as tardy and as a cost factor and not as an enabler.
The following figure shows schematically what typical application landscapes of medium to large companies today look like: