Most junior developers rely on the development environment that is already set up or use the development environment created by other senior developers. Also, setting up this development environment is treated as an inconspicuous task, but in the end, I think that you can say that you have fully participated in the project if you can understand and adjust these settings, and it is the path to becoming a senior. That is why I really liked this lecture that covers not just simple usage of webpack and babel, but also the background of their creation and basic implementation. As the instructor said in the last lecture, webpack5 came out in 2021, so I used 5 when I set up the environment. However, since most of the concepts from 4 are carried over and the explanations are similar, I was proud to see myself understanding the differences between 4 and 5 and developing. Thank you for the great lecture.