There exists a middle ground between everyone gets five nines of reliability (expensive) and everyone only gets three nines of reliability (people die in hospit

There exists a middle ground between everyone gets five nines of reliability (expensive) and everyone only gets three nines of reliability (people die in hospitals). If we focus the same resources on providing reliability where it is needed most, we could actually improve reliability of outcomes. That is, for the same cost of providing a few hours of battery backup for the entire grid we could provide weeks of battery backup for hospitals and data centers.