Both. Trash, water, sewage, transportation, parks, entertainment, grocery stores — someone else doing the dirty work necessary for their world to revolve.
I told my wife when we watched American Blackout on NatGeo "if the world ended tomorrow, my world would not end with it." The sun will still rise, rivers will flow, animals will breathe. It may get tough, and certain luxuries would disappear, but life would go on.
Zombies. Not necessarily in the literal sense, but the "ignorants" will be coming for your brains. Which is okay — I could use more sandbags.Most people here in the cities and suburbs haven't got a prayer if something like that happens for an extended amount of time and they choose to gleefully ignore that fact.