Thank you for leaving a review, Hyeonjun. I had a lot of concerns when deciding on the flow of the lecture, so I'm glad it was helpful. 😊 Design areas are indeed harder to explain clearly compared to technologies or frameworks, so they tend to take relatively more time to understand. When I first learned object-oriented design, I also went through many similar trials and errors and attempts before I could establish my standards. As you apply it to your work and review it periodically, you'll feel differently each time. May you always have days of growth, and have a strong start to the new week. Thank you!