I guess the previous and curiously titled comment was not supposed to be a troll. Yes, these early adopter mush brains are doomed. However you have to respect their impulse.
We do live in a real 'materialist' universe. The scientific method works. Superstition was thrown into the dustbin four hundred years ago. Some folks can't seem to throw anything away. Philosophic hoarders.
Memes, memories and instincts are encoded in the mammal and lizard neuron networks of our brain. Your personality is the story you tell of yourself.
What happens to a waterfall when the water dries up? The same thing that happens to your personality when you die. The process stops.
Immortality? The closest one gets is in the library. A magnificent invention improved upon by the internet and more to come.
Evolution conserves design. Each moment is all. Experience and enjoy. Continue the attempt to understand the universe we actually inhabit.