I mean, it's not common enough for me to spend the money on a backup generator, but it's common enough that you need to at least consider how long you can stay

I mean, it's not common enough for me to spend the money on a backup generator, but it's common enough that you need to at least consider how long you can stay in a house without power, in what weather. Eg, my house will stay warm enough that I don't need to worry about me or the pipes freezing after 1-2 days without power in the winter [although it gets quite nippy after ~18 hours]; if the power is off for more than 3 days in the summer I need to do something or the chest freezer will defrost enough to spoil). Shorter power outages are more common; 10-ish power interruptions of less than ~2 hours per year. It's not like, developing or failing nation bad, but it's not great, especially when the problem is always "a tree limb fell on a wire".