[Klinky]

I could see the concern, though a car is basically always going to require you to drive around with a potentially lethal amount of energy regardless of the storage medium. Also a battery failure does not mean all energy is released simultaneously. A denser battery could result in a smaller battery that could be better protected from damage.

[Schroedingersat]

Depends on the battery a bit. Some NMC chemistries are not far off of it. LFP is far safer. Aqueous sodium ion is nit far from LFP energy density and it'll just boil a bit even if you put one in a blender. From the stats and elements involved, LiS is terrifying, but it could be completely fine to put nails through it.