Dr. K says that calories DO matter for the LR, actually and that once we are LS, calories aren't as important. I find I need to track for calories and macronutrients just to help me evalaute what's working and what's not. Now, my calories range from 1,200-2,000 throughout the week, which shows that calories don't matter, but it helps me to figure out my calories from fat-carbs and protein. My theory is you can manage what you don't measure, and if I see a gain, I can easily go back in my journal.
Perhaps I will stop eventually, but for now, it helps keep me on track, plan for upcoming events and maintain a certain number of fats, carbs and proteins.