When you remove redundancies, it can be streamlining or more efficient, but it can also vastly increase your risk and dependency on systems over which you have no control. Keep your options open! You don't have to use your fireplace instead of a furnace to heat your home, but it's nice to have for both emergencies and special occasions. It doesn't take a disaster or an apocalypse to lose access to a service; a water main break can happen at any time and suddenly not being able to flush your toilet really, really sucks.
I do like zombie apocalypses as a planning tool, though. So much more fun to think about. Maybe I'll make a checklist.
Why Modern Life Makes Us Vulnerable : TreeHugger
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