I believe in a version of this, what i believe to be the obvious version. And that's that reincarnation happens continually, because we don't have singular souls but rather a great many that act in concert. Through interactions with all the people we have ever had, we are influenced, and their souls (composed of all the people they have been influenced by) flows into ours... And then we, in turn, upload ourselves to others in a continual process. Who we are is distributed across many people. This leads to a karmic concern for the future (where our future souls will be in misery or bliss).