As soon as the lecture was released, I bought it and watched all the lectures, even during the Samiljeol holiday. There were parts I already knew and parts I encountered new, and it was a fun time. When I watch general video lectures, they often show ~~ like this ~ without context or flow and end. In the past, (Hellfire Peninsula) was like this, but there was a process in the middle.. I experienced it myself and learned it, and now, as a better alternative, they show ~~ like this ~~, so I muttered to myself a lot while watching the lecture.ㅎㅎ That's right!! That's how it was ~ It used to be like that ㅎㅎㅎ (And come to think of it, I've been a developer for 13 years too... Ugh..) I think it would be good for many backend Spring developers to overcome their vague fears or difficulties about Spring Boot through this lecture. And I think their understanding of the technology they are using will increase. Many instructors are trying and releasing content that teaches how to use the framework, but I think this lecture is the only one that includes detailed content and practical content on the parts that should be utilized from a system operation perspective rather than a program perspective. If you look at recent job postings, the service operation experience ~ section is starting to be included as a required element, so I hope that those who are still juniors will gain indirect experience in responding to failures through this lecture. What I left from the long lecture was pinpoint pinpoint... It echoes. I'm going to install it. I hope you all have a happy and enjoyable developer life..... Thank you.