My stitching was falling apart from new too
Don't get me wrong, I love my DD frontline, use it a lot and see it lasting me for many years to come, just the bags stitching is coming away.
Humans are creatures of habit, when you fold something up you do it the same way each time, and that is were the problem lies. You fold along the same crease line each time, and it will create heat and over time it will fail. A stuff bag reduces the chance of it creasing at the same place, hence increasing the life of the product. This goes for hammocks, tarps, sleeping bags, even the clothes you fold up before packing you rucksack.