Tesla is now producing at a weekly rate equivalent to hundreds of thousands of cars per year
That's only true if you're a time traveler from the future. But it's only April 2018 here, and Tesla is producing about 2600 cars a week. They produced 12000 cars during the first 3 months of the year.
https://www.bloomberg.com/graphics/2018-tesla-tracker/
Also it would be very difficult to get millions of cars out of the Fremont facility.. they already ran out of space there over a year ago.