Interesting that this post came on the third anniversary of my TBI. It's easy to remember because some ship sank on the same day.
I might be a wishful thinker (I try to be) but the thought of an end to improvement rubs me the wrong way. How does that saying go: "The more we learn, the more we realize how much we don't know."
My Occupational Therapist explained that a TBI is like a library where all the books got dumped on the floor. Our job is to pick them back up and put them back on the shelves IN ORDER! In 66+ years I had a lot of books, and we don't even know they are on the floor till we need that particular book, then we need to find it. It took all those years to add to what we know; can we expect it to all jump back in two? About a month ago someone mentioned a name that I recognized as the son of a daughter of someone I have known for many years, but haven't seen for ten. Of course, the last name was different. It took me about 2 weeks to come up with the names, but I did it.
I recently read an article about arctic ground squirrels. https://medium.com/biobuds/ground-squirrels-and-hibernation-b210c638bebc The article I read originally was on JW.org. You'll have to copy and paste, can't seem to create a hyperlink. Something in their brains makes them regenerate damage caused by hibernation. The hyperlink worked!!!
There is so much we don't know and I'm convinced that our brains are capable of amazing things.

The other side of this coin is: all those people who are now old, and NOW suffering from football injuries in high school.
There is something to be said about accepting and learning to live with limitations, but there is also much to be said about trying to do better.