This is an interesting proposition. DCA has potential for cancer treatment because it awakens the mitochondria which can then activate the apoptosis. Perhaps the problem with our motor neurons is not that they are dying but that sick neurons are staying alive too long and contaminating adjacent motor neurons. This would explain the progressive nature of the disease, which doesn't seem to be discussed much (but then again I am not a scientist in the field so I don't have a good sense of the literature). I still don't understand how all our motor neurons happen to be malfunctioning in the same way one after the other. Perhaps DCA would trigger the death of the sick motor neurons and stop the spread of the disease to the others. There is of course absolutely no basis to this little theory of mine and it is pure conjecture.