Yes, of course, there is a lot of progress.
I have been a researcher for 15 years. Compared to when I was at the postdoctoral level, there is a big difference now in what is recommended, said and known about head injuries. In my opinion, people sometimes think that the research is progressing so slowly that it isn't having any effect, but that is not the case. In a few years, we can find effective treatments and start to apply them quickly.
Investing in research is really worthwhile. We need that research. In recent years, we have seen very rapid advances in head injury research. Applying that research is part of the scientific process. When we can prove that a given intervention or treatment works, we also use science to decide on its application, that is, to demonstrate whether it is useful in a clinical setting or not. That is what research and science are all about.