answer:The other parts of the brain can pick up the slack. But the older the longer and not as developed will the other side be able to pick up the slack. There is indeed a brain capacity. According to this article 2.5 petabytes/a million gigabytes Here’s my two cents though. However like stellar evolution and like how we came to be, the brain is constantly evolving. And like the universe, I believe the brains capacity is expanding, rapidly.