There is a joke about the Drupal learning curve that relates it to the Drupal learning cliff. And while the graph generally gets things confused (by placing time on the x-axis instead of the y-axis), the sentiment is understood. Until a person is able to get her/his head around how Drupal does things, it's quite possible to spend a great deal of time to accomplish very little. Even worse, it's possible to spend a great deal of time developing really bad habits.

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