the obvious idea of "when death is approaching with an ETA of less than X, commit suicide with cryonics on immediate standby" is not an integral part of the discussion.

It isn't discussed much because it's not really an option. I'm signed up for cryonics, and I dearly wish this was possible. I'm particularly worried about degenerative brain diseases, such as Alzheimer's, that will kill me long before my body dies and may make preservation pointless. Unfortunately the legal ramifications of suicide + cryonics are very much not in our favor. In certain areas suicide is always followed my mandatory autopsy. Furthermore, it is feared that such actions will bring expensive and potentially fatal legal attack on the preservation organization for encouraging or facilitating suicide/euthanasia. CI and Alcor both refuse to participate in suicide + cryonics acts.

The best current course of action would be to legalize and de-stigmatize assisted suicide.