Despite multiple high-speed accidents, there have been no deaths or serious injuries in a Model S of any kind ever.
Take a look at the Mexico crash fire video. If the drunk hadn't of been quick getting out, he'd be toast.
If the driver had of been slower, sober and elderly, or hit their head, they'd be dead.
I think Tesla S is generally very well designed, but it is stupid for Tesla to ignore the problem, especially when the fix is so inexpensive.
a fix for a car smashing through a concrete wall and nailing a tree at high speed? I suppose the fix would be buying a tank.