No matter how many years go by and how technologically advanced warfare becomes,combat will always have the same basis,Attacking someone or defending yourself to protect yourself and others.It will always boil down to "kill him before he kills you".The way its done has obviously changed but certain skills such as stealth and concealment are still just as valuable today as they ever were.Your survival in close combat will be aided by your knowledge of self defense techniques and also the use of your environment and close quarters weapons.For example,modern warfare scenario,your position has been overrun and you and the man charging you are out of ammo,Your have your body and the rocks and sticks around you.The man with knowledge of martial arts and also the mind to even think of whats around him will have a great advantage.Also the discipline and fitness you develop in and come to respect in your dojo only builds on the discipline and fitness you gain in the militray.Both mental and physical fitness.So yeh i think "old" techniques and mindsets will always have great value in modern combat.Hope this helps to answer your question.
