Reminds me of how if you take out the speech center of the brain immediately, you permanently lose the ability to speak, but if a slow growing tumor takes out t

Reminds me of how if you take out the speech center of the brain immediately, you permanently lose the ability to speak, but if a slow growing tumor takes out the same region, the brain has enough time to slowly shift over to peripheral areas. As an aside, I wonder if the drift seen in neurons represents thought. Perhaps drift has to occur for the brain to continually think and self improve, even with limited inputs. I wonder how different drift rates in regions of the brain relate to things like better long term memory or creativity.