Most of us don’t want to change, really.
I mean, why should we?
What we do are modifications on the original model.
We keep on being ourselves, but hopefully better versions of ourselves.
But what happens when an event occurs that is so catastrophic that you just change?
You change from the known person to an unknown person.
So that when you look at yourself in the mirror, you recognize the person that you were, but the person inside the skin is a different person.