Hacker News Reader

On top of that, the force is spread over an area that is much more suited to withstanding that force (as opposed to the as-yet unfused parietal bones of the skull)

Additionally better friction coefficients when getting the head out - should make things somewhat easier as well.

That's important. My older son had severe jaundice due in part to the hematoma caused by use of a vacuum extractor during a difficult birth.