After about 10 years of consulting in the field of thermodynamics, my week of work has now settled to 25h. I simply cannot be efficient after 4 to 5h of intensi

After about 10 years of consulting in the field of thermodynamics, my week of work has now settled to 25h. I simply cannot be efficient after 4 to 5h of intensive work in this field. What is interesting is that not a single customer complained about it.