I for one do not believe that there is an afterlife, but the fear that there might be one remains in me regardless. As far as I'm concerned, the mind is the seat of our entire experience. It is a very real and organic part of the body. Once it dies, so too does our individual experience. This is quite incomprehensible for us to grasp, so of course many refuse that the very ultimate existential matter that is death is really so cut and dry. Granted, there's no telling what the nature of reality truly is. Whether it's all a simulation, or what have you, will always remain as possibilities, no matter how tenuous their plausibility.
All I know is that I personally cling to the hope of nothingness. If it is indeed true that consciousness does not end with the death of the body, then this to me is more terrifying than any other outcome. The notion of going on forever is not a pleasant one, and I feel like the only people who think or feel that it would be, have not actually sat down and given much thought to what "forever" truly means.
Still, it all seems pretty strange, doesn't it? As in, "non-existence forever, then suddenly existence, then back to non-existence forever, except this time for realsies,". I don't know, man. To be alive is quite the absurd predicament.