I used to think that learning Node.js was simply about getting used to the syntax or how to use frameworks. Through this course, I came to understand how Node.js operates internally and why it was designed that way, which literally felt like my eyes were opened to Node.js. In particular, Section 2. JavaScript's Runtime and Asynchronous Architecture Beyond the Browser, Section 5. Event-Driven Design (EventEmitter), and Section 7. The Buffer part covering memory and hardware control were truly impressive. Thank you so much for creating such a great course and for making it possible to study at an affordable price.