Not apples-to-apples, but having living in places with above-ground and below-ground power supply, I know which one I've found more reliable. Yes, maintenance

Not apples-to-apples, but having living in places with above-ground and below-ground power supply, I know which one I've found more reliable. Yes, maintenance gets more expensive, but that maintenance should be far less frequent. And hopefully more predictable (true maintenance vs emergency repair).