TV analogies for singularity belief without evidence argument

Given that there is over whelming evidence for superimmortality what is the evidence for singularity of the self?

Consciousness seems to be singular from a conscious perspective; you only experience what you experience now. The concept of mapping of physapaths to specific awarepaths solves this problem.

The body is singular in space, time, and matter used. Perdurantism

We do not see any one survive if they have been dead long enough.

There is no evidence of a soul or mind that survives death. Superimmortality needs no souls or supernatural concepts to be true.

There is no evidence of a supernatural after world different from the present world where the mind can reside after death of the body. Superimmortality requires no after world like heavens or hells or other kind of spirit worlds.