It’s not the measurement system’s fault people like to fall down two notches and use hundreds of milliliters instead. The same applies to decimeters. Most people use meters and centimeters for some reason.
I wish I was that knowledgeable lol, but no. It's a joke about the number one downside of owning a great Dane: everyone and their mom commenting about their size by saying "that's not a dog, it's a horse!" 😁
That´s because it in fact is. In Austria dekagramm is a common unit, abbreviated dkg or dag. In shops it´s standard to buy and label cheese and sliced cold meats in dag and in Austrian recipe books stuff like flour, cornstarch, sugar, butter and fat are measured in dkg.