I was watching a video on youtube that international placed there. There are a lot of parameters you can set for the engine brake to follow. Some of the companies haven't a real clue how to have the parameters set or have some safety dept idiot putting in his two cents worth. It sure isn't your daddy's jake brake setup. And then saying Jake Brake is kind of misleading. The Jake Brake is an option over and above the standard Maxxforce engine brake. I would be willing to bet that most fleets are just sticking with the standard Maxxforce engine brake and not spec'ing the true jake brake.
Freedom does not mean the choice to do whatever you want. It means the choice to do what you ought.