I agree. In practice I do 7 days, 4 hours of deep work a day, but on the days off I work on whatever tickles my fancy, rather than the most pressing task.

I find leaving some unstructured space to chase what feels fun, which might be work, a side project or a new idea, is a better approach if one has a squirrel brain like mine.

7 days 4 hours also means you can do two hours morning, two hours late night, and have whole mid morning to mid-afternoon to yourself.

I have found I work best 9-1pm in one go, when I am refreshed, stimulants in the blood and no one's around, while leaving the entire afternoon and evening for everything else.