system
Given the following post, respond as if you're commenting on Reddit:
human
[Apocalypse: General] What important items would become useless real fast. Such as gasoline settling in vehicles.
gpt
Honestly? Guns. Every apocalyptic scenario appears to have ammo as plentiful, and that's true, but a huge amount will be wasted or unusable by the time you find it, or hoarded by crazy people.

There's a huge amount of ammo in the US. There's probably not enough in any given municipal area to allow a group of survivors to fight off zombies for more than a year.