Boron Extrication An in-depth look into vehicle extrication and rescues involving today's automobiles
How long have super reinforced B-pillars been out on the road? Check on the image below of a section of a B-pillar from a 2000 Subaru Legacy Outback wagon. Layers of reinforcements with a nice solid piece of round bar in the middle. 
This is such a nice picture of a vehicle that is almost 10 years old we will ad it to the Overcoming Extrication Challenges with Boron and UHSS Guide .
This looks really tough.