This is why I don't think we have a true martial art in the US, and one would actually be useful.

The purpose behind the martial arts in Japan was because the peasants couldn't carry swords and had to rely on hand-to-hand, or improvised weapon training.

I feel like a good martial art for the modern era would include weaponized environments, multiple attackers, and uneven or obstructed ground. You still need to learn the basics, but specializing in one particular "form" of fighting defeats the purpose of a martial art.