Hardened stainless steel tell you almost nothing without knowing the thickness and the geometry.

At this point it’s slightly more than marketing puffery.

It's not common sense. Virtually all car and truck frames are made of steel. But honestly, the metal doesn't matter. Whether a pedestrian is hit by 3000 pounds of aluminum at 45 miles per hour or 3000 pounds of steel at 45 miles per hour, there is going to be a high chance of fatality.

"An IIHS study found that vehicles equipped with automatic braking that detects pedestrians had a 27 percent lower rate of pedestrian crashes than vehicles without such technology."

Teslas typically have the most advanced crash avoidance systems on the market. Virtually all Teslas have 5 star safety ratings in crashes, both in Europe and U.S. [1]

[1] https://www.tesla.com/blog/model-s-receives-5-star-euro-ncap...