One problem with PDCAAS is that it's based on the limiting EAA in a food, but everyone interprets it as a general bioavailability ratio when it's not.
A food with 1000x the EAAs per calorie of every other food, but 0 of one EAA would score below the other foods even though you could get the day's worth of EAA on 1/1000 the calories + one serving of an additional food that can give you the missing EAA (i.e. eat more than one food every day).
A food with 1000x the EAAs per calorie of every other food, but 0 of one EAA would score below the other foods even though you could get the day's worth of EAA on 1/1000 the calories + one serving of an additional food that can give you the missing EAA (i.e. eat more than one food every day).