I think it's likely that Alzheimers does irreparable information damage. If I'm diagnosed, suicide would certainly be my choice before it begins to severely impair my cognition. There are ways to kill yourself that resemble natural death and leave only minimal evidence of any kind (I am thinking specifically of nitrogen asphyxiation). You'd need co-conspirators and some careful timing, but I think it might be achievable.
That said, I do think there's a huge demand for a cryonics organization that gets rid of ridiculous, barbaric things like death by dehydration as a legal route to suicide. Perhaps something in international waters, or a nation more friendly to medical suicide?
So being signed up for cryonics shifts my views on life and death, as might be expected.
In particular, it focuses my views of success on the preservation of my brain (everything else too, just in case, but especially the brain). This means, obviously, not just the lump of meat but also the information within it.
If I'm suffering a degenerative disease to that meat or its information, I'm going to want to cryocide to preserve the information (and the idea of living through slow brain death doesn't thrill me regardless).
What I don't know is: given the current state of science, what sorts of things do I need to be worried about?
In particular, I'm wondering about Alzheimer's; does it appear to be damage to the information, or to the retrieval mechanism?
But any other such diseases interest me in this context.
Thanks!
-Robin