I love your scientific approach on that topic! I can completely follow the learning stages from my own experience. The last stage can also be dangerous because we are so used to our skills and one can think he know everything and don't recognize that soon the established skills are not needed anymore but we formed a strong habit to do so because it needs not much of our energy to do so and we must force us to, preferably proactive to begin a new cycle and after that again a new cycle of learning which can cause pain until life long learning is a habit.

Thank you!