Many organizations need to train people for real-world fights. Think police departments, militaries, prison guards and the like. By far the most popular thing

Many organizations need to train people for real-world fights. Think police departments, militaries, prison guards and the like. By far the most popular thing to teach is some variant on Krav Maga. Which focuses heavily on rapid incapacitation while maintaining your ability to move. Going to the ground wrestling is an excellent way to be taken out by your enemy's ally, or finding out the hard way that your enemy had a hidden knife you didn't know about. The success of BJJ in MMA has not changed what gets taught to people who actually are at risk of winding up in a street fight with lives on the line.