Since I was doing Flutter alone, I got tired of writing code in the same pattern every time, and I felt like my skills weren't improving because I was hitting a limit. I focused on functions without thinking about the architecture, but I realized that the way I had developed it before was wrong. Using libraries is convenient and good in the short term, but there are many cases where errors occur even if you upgrade the Flutter version a little, so it was good that the lecture didn't use many libraries, and it was also good that the router was covered in detail. It's a little disappointing that there is no network communication part, but that's something that can be found quickly if you look for it. I was able to think about how to develop Flutter in the future. Thank you.