Agree with your point on complexity, I was thinking along these lines too. I realized that the real problem comes when you have a lot of information in your hea

Agree with your point on complexity, I was thinking along these lines too. I realized that the real problem comes when you have a lot of information in your head, and you are trying to keep everything in mind at the same time, designing the solution of a complex problem, tackling many of the small details in parallel. That requires a lot of focus and a very specific state of mind, and getting distracted when you are at that point is really bad. If you are just going through a buglist or a list of simple tasks, it might not be such a big deal, but most of the time, even when not actively designing, you need to put a lot of effort to get in the right mental state, load into your mental cache the complexity of the codebase you are working in. And realizing this also helped me concentrate better. Sometimes I have trouble starting to code, and I found that focusing on a very simple problem helps you get back on track and you automatically start remembering everything you need for your work. In the past I used to make the mistake of trying to solve everything at the same time, have a perfect plan before starting to write, and I was completely blocked. I think it depends a lot on the person and their mental processes while programming.