My DPs grandfather has dementia. He also has a savings account and the same belief that he'd go out in Switzerland, that no damn brain condition was going to take him out in an undignified way after he'd struggle through the wars, that he'd detest to be in a care home.
The dementia was cruel, he went from being still 90% him with the drugs doing well to slow progress of the disease to being 10% him and unable to make the decision to go to Switzerland, let alone make the journey. His specialist said the same always happens; that you'd have to go whilst you were healthy and nobody wants to do that. The outlook looks good, until it doesn't.
He's not in a care home but caring for him is hard work and the whole family are involved, I can't imagine how hard it would be if they were not.
I'm lucky in a weird way because somehow he remembers who I am, mostly, and whilst he's lost in his own mind; he's such a lovely man most of the time. His anger and violent outbursts are reserved for his wife, so far, and she does all the physical caring so he keeps his dignity.
It's no better for him than it would be for me. It's a horrendous way to go. I hope to god we find a cure, or at least an effective control, very soon.