Theory: If you were to become immortal aka infinite lifespan (I know you know the definition of immortal, but 'infinite' plays a role here) you would cease to experience events with a time component, so there is nothing to remember, forget, or anticipate.

Consider the image.
black -> finite
red -> infinite
Solve for "x" in each.
What does it mean to perceive an event (green) from line tick to line tick.

{This is totally a subtoot, but I don't see that toot in my timeline anymore.}