Where I'm going with this is how we calculate risk. We calculate risk, usually, based on likelihood versus consequences to get a risk score. You brought up the Old Crow example. In rural Canada, the risk of electricity outages is much higher than in it is an urban setting. I don't have any statistics to back that up; it's anecdotal. It is where I live. Two or three times every winter, it goes out. If we depend solely on electricity to heat our homes and the power goes out, we have a problem. Hence, a backup is a requirement.
How does having two systems impact the economics of the overall system?