Partly money. "Rolling a truck" is one of the most expensive operational costs for a utility. Sending people places to fix problems is not ideal, especially whe

Partly money. "Rolling a truck" is one of the most expensive operational costs for a utility. Sending people places to fix problems is not ideal, especially when those places can be substations or transformers in the middle of nowhere. Partly, sometimes, people don't understand what systems are connected to which networks. Maybe it's a logical misunderstanding -- they're leasing a communications path that they don't realize is connected to the Internet. Sometimes it's a physical misunderstanding, they just never diagrammed everything and have no idea what's isolated and not.