How are people breaking missions with the option?
You turn it on, upgrade your stations, then turn it back off, then proceed about your gameplay.
The ethanol isn't really in your posession, it's just a temp value.
Maybe I don't understand how people are 'breaking missions' when they are upgrading their stations at base camp.
it doesn't give you anything. It simulates that you have 'x' number of whatever while you are crafting. If you have it on all the time, then I suppose you could screw up something if you have it on while you are doing something other than crafting.