The only time you use the Jaws is if the people can not be extracted by lesser means.
Various articles about the loon Anne Heche opined that her body was literally cooked, being inside the burning car for 30 minutes.
I received my original EMT certification 50 years ago and back in the good old days we were taught to use cervical collars, long spine boards and the devilishly hard to use short spine boards. Over 20 years as an EMT, I saw better extrication technologies, but the rule was always to immobilize before moving accident victims. I think this research is very helpful to Improving pre hospital emergency care. That said we were alway conscious of our on scene time. Research on casualty management in the Viet Nam war revealed the “golden hour” where survival of serious trauma victims was optimized when they could be gotten to a trauma specialty center within one hour. Only a few times in my two decades of being an EMT did I see serious extrication in an auto accident. However, there were numerous times when extrication was not needed and we took all the precautions about spine immobilization and increased our time on scene as a result. I am happy that this research will lead to better extrication protocols and possibly simpler extrication technologies.