After listening to all of them, I think I can relieve some of the technical debt related to Spring Boot that has been piling up. When I first started learning technology in this field, I liked to understand the history, how it got to where it is, and what would be good if I wrote it this way, but at some point, I just looked at the official manual and accepted that I had to write it that way and moved on. (It's still increasing.) I had been coding in Python for a while, so I hadn't touched Spring Boot for several years, but I was able to organize things that no one tells you about because I used it so naturally, and I'm grateful that you gave me the time to organize the Spring Boot core in such a short time.