Darlene not existing in the alternative reality has to mean something, right?
Elliot’s dad is alive in this reality (dead in other), Tyrell is alive in this reality (dead in the other), Angela is alive in this reality (dead in the other), Darlene non-existence as far as we know in this reality (alive in the other).
Everyone that Eliot wishes was alive in the original reality (but is dead) is alive in the new reality.
The new reality appears to be related to our wishes and desires. Does Elliot wish Darlene was never around? That doesn’t seem right, but I dunno.