Lunar repair becomes economically legible only after depot spacing reaches a useful radius.
Before that threshold, every major repair still behaves like a mission. Parts have to be staged too carefully, route windows become too brittle, and the cost of moving technicians or service robots remains hard to amortize across unrelated jobs. Once depots sit close enough to each other, repair starts to behave like a loop instead.
That shift matters because routine loops attract different planning. Inventory can be shared, delays can be absorbed, and local failures do not automatically become regional disruptions. The depot network stops supporting isolated fixes and begins supporting a maintenance economy.
The Moon does not need infinite repair density. It needs enough density that distance stops turning every broken interface into a special event.