I was diligent about using cronometer for 3-4 months while I was losing a lot of weight even if it meant I had to guess a lot of stuff (traveling–eating at restaurants–) it was clearly valuable and helpful to me then. I still log my weight in every week or two but gave up on tracking the calories/fat/protein and all the rest.
I have been stable at or just above my goal weight and am sure I am eating 25-50 grams of carbs daily (and still in ketosis or at least fat adapted). I kept it to 20-30 during the heavy duty weight loss period. Walk 5 miles a day at least 6 days a week.
Why should I bother tracking all the food I eat, much less the macronutrients? I am open to suggestions but I think the discipline it introduced is no longer required.