Quote Originally Posted by Manaz View Post
A cage makes getting you out of a wreck a damned sight harder. That's the primary reason for the restrictions.
Also, the reason cages arn't really user friendly is because the effect they have on the cruple zones built into the car by default.

These crupmle zones are designed to dissapate energy in a crash.

If you add extra stiffness into the body (by way of a cage) you change the way the energy disspates. Instead of the door and piller crumpling for example, the energy is dissapated in other ways, which may in an extreme case mean your car rolls 4-5 times instead of two... Along with this, comes the possibility of taking out more innocent road users