Thank you for that question. It's an interesting one.
Advance requests for medical assistance in dying are interesting precisely because one can still think and make decisions. At the moment, although I have Alzheimer's disease at a moderate stage, I can still speak to you relatively well.
I'd rather be able to decide when I've reached my limit, or at least the one I think I've reached, at the risk of getting it wrong, then allowing too much time to go by and reach a stage at which I can no longer express myself clearly.
What I'm about to say may be stupid, but I know that the end of my time with Alzheimer's disease might be very difficult, both physically and mentally. But what I don't want to do is allow my destiny to be in the hands of someone who would let me remain ill like that for a long time.
My father got to the end of his disease relatively quickly. The difficult years did not last very long. But my grandmother, meaning his mother, was in a neurovegetative state for seven years.