Might seem crazy, but the quake in northern California brings home the amount of damage to businesses that can be wraught. If an earthquake of the same magnitude (6.1?) hits the Fremont area, what would be the setback to Tesla? Would the building hold up? Would all the robots need to be recalibrated, everything re-aligned and reset? How much damage to those gigantic aluminum presses would there be? And, what if the quake is "the big one" ? Obviously our first concern would be all the people affected, and I am sure the USA and other helpful nations would respond with incredible assistance to the area; but eventually the economic effect to individual companies would be examined, and their stock prices would likely be under some pressure. My point is, the second manufacturing plant can't come soon enough, for the sake of redundancy. And perhaps it would be best to keep the Gigafactory in a place that is not prone to earthquakes. If both the Gigafactory and manufacturing plant were damaged it could hurt Tesla (the company and the stock) significantly.