There is no lack of comfort at all. Think of the worrying that xtians do if they´re going to hell or heaven! I was brought up with that fear - it´s huge and horrible! After I escaped it took me years to understand more about life and death - you don´t learn that in church. The best thing I learned is that all life is family, so I learned from my pets when I brought them to the vet after they became too ill. They knew it was time and welcomed death - like some people I´ve seen die and unlike my parents, who never stopped crying for their god like frightened children.
So I´ll go to my death in the way I go to sleep after a busy day; unable to stay any longer - suffering won´t be too bad if the vet is there.
My grandmother died this week at 88. She was the one who begath the questioning of god in my family, after her and her boyfriend's families refused to let them marry over religious differences. But as with many Canadians, we end up sprawled at the country's extremes and cross-country flights are expensive (she lived in Newfoundland, I've not lived anywhere near there in 25 years), so we didn't see much of each other in my adult life. We emailed and Skyped on occasion, I set up her computer over the phone, across the country. She was quite a modern woman, and had done some travelling. But she menopaused at age 38 and since as a young girl she'd been real skinny, tho she'd had a great nutrition all her life, her bone density dropped quickly and she ended up going through 2 separate hip replacements at 70 and 78. So from 65 onward she was often lame and could not enjoy life much. We weren't very close, and death always comes as a surprise, but she died peacefully in her sleep, finally. I know for myself, given her quality of life, I would not have wanted to go past 65, I do not understand the urge to push on at such an age. She wasn't really close to anyone in the family and didn't raise my mother, for all sorts of drama that went on back then.
My other 2 grandparents died in 2003-4, my grandad didn't move from the recliner for 35 years, bad back. He lived in the front of the home, and my grandmother lived near the kitchen. She brought him meals, changed his sheets, and did his laundry (they had a wringer!) that was the extent of their interaction for the last 20 years of communal life. She was his elder by 10 years and had always worn the pants in the family. They spent the last year in a nursing home, separated, she died 6 months after him, at 93. She was an unbreakable, unstoppable, energetic 4'10" woman, champion bowler til 85, chomped on garlic and onions and food from the sea all her life. Her health showed not a single sign of deterioration until the final year. She broke one bone in her life from a fall in her 80s, she had climbed to the roof to clean the gutters!!! Other than that she never needed a doctor. I'll probably be like my grandad. I have had a bad back all my life, since my teens. That assuredly will be my first failing in old age, as it's already started on its path to failure. I do not expect to wish to extend my life beyond its useful and/or happy phase. So I will live the rest of my life carefree and what will be will be. All three of those grandparents were agnostic atheists, they were the beginning of atheism in my family, in generations/geography where atheism was pretty rare and religion had a very strong hold on daily life (Maritimes).
Families get smaller, life moves along. That is a beautiful aspect of atheism, death is simply death. My entire family treats it exactly in that manner. Sometimes it seems like it is our one common value.