Although this is not specific to DCC, many Tortoise are controlled by a driver board that is tied to some form of train computer (JMRI) control or DCC control (throttle).
There are issues that are directly tied to installation errors that show up as long term reliability errors latter. These unknown root cause non intentional installation errors have instead been misdiagnoses as Tortoise manufacturing defects. To learn more, go here: Tortoise Myths & Issues