Physicists tell us that there’s nothing in the laws of nature we know requiring time to flow forward. According to the laws, time could shift into reverse (entropy be damned, I guess).
If time were to flow backward, birth would simply be another event horizon the way death is. It would be lofically equivalent to death.
To live forever, you’d have to pull off the trick of making time stand still, wouldn’t you? Immortality would be nothing happening at all.
But that’s kinda like death, too, isn’t it?