I am a developer at Toss, who participated in the lecture together and helped with the filming. While preparing this lecture, I thought about quite a lot. The topic of lightweight threads is not an easy one, and I also considered how to approach it. However, following the opinion of the person filming the lecture, I proceeded with the goal of providing as many diverse examples as possible and making the lecture more familiar rather than tightly structured. While it's a method with disadvantages, I also believe it has advantages. This lecture cannot make you a person who uses coroutines perfectly. This is only a lecture after all. Based on this lecture, if you try using it in various ways in practice, I believe you can become someone who uses coroutines perfectly. If this lecture doesn't satisfy you, please provide feedback as I have a strong willingness to learn and improve based on what's lacking.