Is the afterlife universal or only for certain people?

Since the Dutch cardiologist found that only about one fifth of surveyed people who experienced cardiac arrest had an NDE, does this mean that only certain people get to experience the afterlife?

What if everything just goes black for those who haven't passed some threshold in life?

I believe the vast majority of NDEs are real and sincere. But the idea that I might not get to experience the afterlife when I die is troubling.

What if it's for "good enough" people only?

I'm grateful for what I have but my life has been difficult. Abuse, neglect, illness, loss, the deepest betrayal imaginable. I hope there's something good waiting for me on the other side.