Complexity is a moving target.

In Living with Complexity , Professor Donald Arthur Norman wrote: “When things are too simple, they are also viewed as dull and uneventful. Psychologists have demonstrated that people prefer a middle level of complexity: too simple and we are bored, too complex and we are confused."

"Moreover, the ideal level of complexity is a moving target, because the more expert we become at any subject, the more complexity we prefer.”