My Canadian parents are in their 80's so naturally a lot of their friends of the same age are dying. And two of them have been via MAID. In one case, which was surprising to me, a man who had survived cancer - he was not terminal but certainly wasn't getting any better - elected to die via MAID after his wife died. She passed, he called his doctor and less than a week later he was also dead. He got a chance to visit…
My parents both died of glioblastomas, a particularly aggressive form of brain cancer. As the surgeon explained after the biopsy, "This is what you will die from." 3 months from diagnosis to death for my mom, a year and change for my dad. Seeing that process up close made very clear to me what I wanted for myself.
All of this was reinforced for me by the experience of Brittany Maynard: https://en.wikipedia.org/wiki/Brittany_Maynard
She was diagnosed with a glioblastoma and was given 6 months to live. She moved from California to Oregon so she could die in a controlled and humane manner. She wrote about that here: https://www.cnn.com/2014/10/07/opinion/maynard-assisted-suic...
I get the thought of medically-assisted suicide wigs some people out, and we have to be careful to make sure the urge isn't just a temporary distortion of mood and thought. But having seen it up close, I am very much not interested in spending months dying slowly and dragging my family through hell just to make sure random people not involved don't have to think about hard things or deal with their feelings about death.