Anyone watching?
For me, there is no question or doubt. A sensient person has the right to decide how they want to live and how they want to die.
But being how it is, if I ever developed dementia, I would end my life immediately, sadly without help of Dignitas.
No one but me has the right to decide whether my life is worth living and I am alone am answerable for my own life.
I would never presume to make such a decision for anyone else but myself, no matter what the cost to me.