On the first I was knocked out cold. I didn't die and it wasn't necessary to shut it down for the season. I missed a couple of games and was fine. I had a couple of concussions before and have had a couple since. I haven't died, I don't have headaches, memory loss, or any other symptoms. There's a possibility these injuries could be a factor when I'm old but then again they might not.
I'm fine. I know others with similar experiences that are fine. I know others who aren't as fine who have had far less head trauma than I.
It's simply not the same for everyone.