Board Thread:Questions and Answers/@comment-36761202-20180911205942/@comment-39120460-20200625163128

Actually, I think White would have evolved in a sense. He may have acquired another balancing attribute opposed to its hollow nature. As Urahara said while explaining how to save Masaki [Manga Ch 535], the opposite of Quincies are Shinigami, and the opposite of Hollows are Humans. So, mixing a human soul with a hollow soul would in turn "balance" things while also changing the new united being if that makes sense. This results in the hollow breaking the limits each would have had individually while (this second part is just speculation as I don't think we've had a clear explanation on this) creating something now with more human characteristics. This may include like giving the being reason, so it doesn't merely act on instincts like White