Documentation. When you're working on a new build, everything is frequently just in your head or those of your teammates, and that isn't a problem initially. A

Documentation. When you're working on a new build, everything is frequently just in your head or those of your teammates, and that isn't a problem initially. And if you have one main product, you don't need to spend a lot of time on documenting which resources were for what. When you have a bunch of old ones, which you may not actually often spend much time on, it's much more important to be able to figure out why that old thing is running, exactly what was shipped to customers when (in the case of physical product). Otherwise you risk having to do archaeology every time you turn round. Or just not having the information when some customers says that X has stopped working on a device that you shipped 5 years ago but guaranteed for 10.