The first maintenance layer on the Moon will matter more than many of the assets it supports. Until repair becomes procedural, every lunar installation remains partly temporary.
That maintenance layer has three jobs. It has to move spare parts predictably. It has to route service authority through relay corridors. And it has to decide which failures are urgent enough to interrupt ordinary operating schedules. Without those three functions, lunar systems behave like isolated projects that happen to share geography.
The reason this layer arrives early is simple. The Moon punishes deferred repair. Distance turns small delays into scheduling problems. Dust turns ordinary wear into contamination risk. Relay scarcity means a service intervention has to be coordinated, not merely dispatched.
This is why maintenance on the Moon is not a back-office category. It is the first sign that the environment has moved from demonstration to infrastructure. A system becomes real the moment someone has to keep it alive on a calendar.