i only know TKD and imho, good martial arts must evolve with times.
I remembered that my TKD coach told us that we should avoid fighting as much as we can. If we really have to fight, what we learnt are to train our reflexes; simply take out belt, grab a tool or weapon and make sure we win.
Therefore i see Krav Maga, systema, MMA as ever-evolving, while traditional ones fade.