While some communities have enacted legislation allowing suicide with the assistance of a physician, any such case almost certainly would be followed by an autopsy which would include dissection of the brain.

I didn't think about this. Still, I would look more into that scenario. I am not sure Alcor has properly investigated all the options here: there are many countries in the world and maybe some would allow suicide cryonics.

You do know that cryonics is not just dropping a body or a brain in liquid nitrogen, don't you? Cellular damage in that scenario would be too high; while it's not completely out of the question that future science will be able to restore someone frozen that way, cryonics tries to preserve the patient in as good condition as possible, which includes, in optimal case:

• Connect the patient to cardiopulmonary support as soon as possible, which realistically means as soon as legal death is proclaimed. (*)
• Slowly cool the body
• Replace blood with cryoprotectant
• Continue to slowly cool the body At some point the cardiopulmonary support can be disconnected.

Now, (*) is the main point that could use further optimization. As the things stand today, cryonicists are not allowed to do their thing with the body before legal death is proclaimed. They are lucky if the medical staff is supportive, relatives do not interfere and legal death is proclaimed quickly. But even in this scenario they could in principle act quicker, if they were allowed to. I think it is quite possible that Alcor did not see a reason to investigate in necessary detail the legal situation in the world regarding whether there exists such a country where one can do suicide cryonics and avoid autopsy. If they are not flexible enough, I think KrioRus just might. And if a cryonics company will open in China... who knows, maybe they will be more relaxed about euthanasia?