Space and weight. It saves on both while also being more flexible and presumably much simpler to install. Install times will save money at the factory and the space savings can be used elsewhere. In theory it can also be more reliable. It may also be able to provide smarter brake pressure to come to a stop quicker and more safely. The only real downside will probably be brake feel. You aren’t going to get a lot of feedback, but for day to day driving that isn’t much of a concern.