Hello, I enjoyed the lecture very much. Even though I took the course after reading the Next.js official documentation first, the early part of the lecture where each topic was clearly addressed with the flow of problem → background → solution helped me organize my understanding well. I was particularly impressed by the explanation approach that unfolded from the perspective that development is ultimately about problem-solving, and the parts where you explained based on actual code along with background knowledge were very helpful. I think this lecture can serve as a good guide for those who are just about to introduce Next.js or those who are considering introducing SSR after feeling the limitations of CSR. However, there were a few disappointing aspects. In the early routing implementation part, when you started explaining with code written by generative AI, it was confusing from my perspective of expecting actual internal implementation code, and I had doubts about the direction of the lecture. (Of course, my misunderstanding was cleared up when you later explained based on actual code.) Also, curriculum title compositions like path automation or template.tsx animation that you implemented directly might feel like official Next.js features, which could cause some confusion, so it would be better if you separated them into separate sessions or clarified the explanations. And personally, I was disappointed by the lack of explanation about cache strategies that have become important with App Router. There were also some parts in the lecture flow where mentioning later content early on made it feel like prerequisite knowledge was needed. Nevertheless, overall it was a well-organized lecture that is helpful for practical work. Thank you.

I've been working on several projects using Next.js so far, but I always wondered if my understanding of the framework I was using was insufficient. However, after taking this course, I feel like I've gained a clear understanding of why one should use Next.js, a React-based framework. In particular, there were many parts of the concepts of server routing and server components that I couldn't understand even by looking at the official documentation, but I was able to learn those parts through actual example code and understand them easily through the instructor's highly intuitive explanations. I used to feel like I was only superficially implementing features while working on projects. However, now, when implementing any feature, I can also consider, 'Why is this approach a better choice?' and 'What are the pros and cons of this structure?'. Thanks to this, my fear of Next.js has also disappeared, and furthermore, I've gained confidence that I can easily absorb new features no matter what version appears. This course is highly recommended for those who want to understand the fundamental principles and design intentions, not just superficial usage. I am confident that this course I took can be a turning point for developers who want to properly understand Next.js.

Next.js has been updating its versions at a rapid pace. While taking this course, I was able to deeply understand that Next.js version updates are not just about adding features, but about overcoming certain limitations and evolving to provide a better development experience. I first encountered you on YouTube, and I appreciate you uploading great lectures every time.

This course helped me upgrade from simply using Next.js to truly understanding its principles. Technology is constantly and rapidly changing, but understanding the fundamental principles makes it easy to adapt to changes. I recommend this to anyone who is using Next.js but has questions like, "Why is this structure necessary?" Thank you for the great course! 🥰