Why did Rob as an old man still wake up at 4 in the morning?

Rob, as an old man, continued to wake up at 4 in the morning due to a deeply ingrained routine developed over decades. This early rising habit not only provided him solitude and quiet time for reflection but also allowed him to engage in activities he cherished, such as reading and enjoying his morning coffee. Additionally, the discipline of waking up early helped him maintain a sense of purpose and structure in his daily life.