I have always used Spring Boot to set up and use various infrastructure beans through the property sources or custom beans provided by Spring Boot, but after listening to the lecture, I realized that I had been using it without understanding it while just enjoying the convenience provided. After creating AutoConfiguration myself and looking at Spring Boot's automatic configuration, I understood it easily. I think again about how high the hurdle was for Spring development before Spring Boot existed... I can really feel that you have prepared the lecture meticulously! Thank you for preparing a quality lecture so that developers can grow. I will wait for the next episode!!