This is just like the other weird American units, it works much better in the specific case it was designed around, but fail really fast and really bad in other

This is just like the other weird American units, it works much better in the specific case it was designed around, but fail really fast and really bad in other contexts. If you are a farmer with 26 acres of field that need to be irrigated the equivalence of 1 foot of water every 2 weeks throughout the dry season which is expected to last 3 months, it is easy to calculate that you need 26 × 6 acre feet of water for that. But ones you use volume for literally anything else the flaws of the unit become very apparent.