People seem to have forgotten that since Elon/Tesla started designing manufacturing plant - GigaFactory - Elon has complained that production lines are way too slow. He wants to speed them up considerably. Near full automation is the key. Get people out of the way. If you can double the speed of the assembly line, you just doubled production. 500,000 goes to near 1,000,000. Elon has suggested that design/engineering of manufacturing plant could be up to 10x more effective than work on the product design/engineering, when it comes to cost savings, for example. google search for more Musk: Tesla's factory will become an 'alien dreadnought'