I like the ram only aspect but I wonder if the risk of losing all that data in a power disruption is worth it? Seems like it would make a temptimg target for "accidents" in areas where many people vote a certain way and some group wants to disrupt this process. Voting in the US is already a huge ordeal of waiting in line for hours, a lot of those people probably can't / won't come back to revote if the volatile memory erases the machine data.