This is so much fun. When I was a newbie, I took lectures like this purely for studying, but now that I have some experience, I look for them out of curiosity about how you would explain things. The fact that you can explain these concepts so calmly and easily shows your expertise. Even though I already know the concepts, watching this makes me realize that I would have learned them faster if I had learned them this way. Or, that I should explain things this way to better communicate with other developers in the future. I'm learning so much. Thank you so much.