I will note that, if I'm looking through an area hit by a nuclear weapon for hydration, I'm not overly concerned how nasty the beer tastes.
I will also note that this study looked at a number of canned beverages, not just beer.
In a society where infrasture may have broken down following a nuclear war, again, I will say that the information was quite useful.
At the time of this study, wouldn't most warehouses have been near urban areas? Wouldn't, also, said urban areas be the most likely targets of a nuclear war?
So, as per this study, if you're trying to deal with thousands of individuals with significantly damaged infrastructure, one need not necessarily discard all the beverages found in the area of a nuclear attack.
Again, I think this is a clear example of pertinent question for doomsday planning, back when government studies tried to accomplish useful things.