Hello, Mango! This is the instructor :D First of all, thank you so much for taking the course <From Events to SPA, the Essential Engine of Interactive Web - [Mastering DOM Part 2]> and for leaving such a precious record of your learning. I am glad to hear that you were satisfied with the overall flow, but I have taken your comment about the disappointment in the transition from Vanilla JS to SPA deeply to heart. Based on your valuable feedback, I will make sure to prepare future courses with even more solid and enriched content. Your opinion serves as a great foundation for creating better lectures. I will be rooting for your continued growth and enjoyment in your future learning journey. To repay the trust you have shown in our curriculum, I would like to offer you a small benefit. If there are any additional courses you wish to take among our curriculum, please feel free to contact us at our inquiry email, jeony0535@naver.com. I will send you a discount coupon immediately after checking. Thank you once again for sharing your valuable time and thoughts. I sincerely support your growth! :D