Originally Posted by Cajuncowboy
Technology can lessen the violence of the impact of the head on the inside of the helmet.
Yes, it can. Even with that, there can still be concussions that will occur due to impact to the head. There are also going to be concussions due to plays with the whiplash effect where the head snaps around and the brain sloshes around within the skull and gets battered around. There is room for improvement, but there are always going to be some limitations. It definitely isn't all or nothing. It is going to be some improvement and always some risk.