I think this ignores that certain types of optimizations can have benefits that are small but almost constant. A more fluid environment for your task can resul

I think this ignores that certain types of optimizations can have benefits that are small but almost constant. A more fluid environment for your task can result in less jarring stops that take you out of the task at hand, and keep you in a highly focused state. Maximizing the time in this state, where you might actually be some multiple more productive, is a vast improvement over just saving a little time.