As I'm getting older (mid 40s), I have a different view now than before. I've seen people die in real life, and it was horrific. Even in hospital beds with morphine drips.
I don't want to die in agony, or slowly suffocating as many do. I'll end it before it goes too far.
I think more people should actually go to hospitals and see how real people die, instead of the comforting movie version where the family is gathered around while the old person slowly falls to sleep. That's unfortunately not that common.
If I get cancer, I'll hang on for a while until there's not much hope left, and then go to a place with assisted suicide.