Kind of on this topic...
My older sister was born with multiple chromosomal defects which left her stunted developmentally, and wholly unable to communicate, let alone care for herself. She was expected to survive maybe 20 years, but we celebrated her 50th a couple years ago. There's no trust that the system would give two shits for someone in her condition, so the last couple years have been working with my parents putting together a trust to pay for her care when my parents are gone, which me and my other sibling would take over as guardians and manage her care.
We've been also dealing with the cat's Small Cell Lymphoma for the last two years (with a 2-5 year prognosis). So I was blindsided when I got the call from my father last night that my sister was dying. Her colon was twisted, and the only options in front of us were to let her go, or to do surgery and have her use a colostomy bag for the rest of her life. Because she can't comprehend things at even the level of a child, there is basically no way that would work.
Because the Death with Dignity Act in Washington State doesn't cover her (she is unable to communicate her desires), we were left just watching her struggle at the end. While we all had the time and opportunity to say good-bye, it just wasn't possible to have someone there 24/7 while we waited for the end. Ultimately, she passed this morning around the time my father was getting ready to head back into the hospital. It would be been better if we could have been present at the end, instead of having to juggle our parents' health with the desire to be there at the end. It sucks.