In the beginning, VW brought forth the Beetle. The year was 1946: They looked upon what they had created, and saw it was Goodenough.
On the 2nd day (in 1950), VW brought forth the T1 Transporter. And it was also Goodenough.
Concealed from view beneath the shell of these disparate vehicles was a single skateboard design that looked like this one:
Lo, 70 yrs ago, as VW needed to massively scale production and increase the addressable market for its vehicles, they didn't try to reinvent the wheel. Verily, they saw they had a perfectly usable one already, which they pressed into service in dozens of variants of buses, campers, trucks, and doublecabs over the next decade.
Nor did they waste time 'perfecting' systems that were already suitable for purpose, or adaptable to purpose. They got on with it, building millions of Bugs and Buses, thereby becoming the world's largest maker of autos.
This is what Tesla will do now. They'll reuse/repurpose modules they've already created thru great effort and expense to create and manufacture a new line of Cybertrucks, buses, campers, and sub-compact cars that are cheap and fast to design, tool-up, and manufacture until all creation knows the name TESLA. And they will look like origami works of art for a new century.
The era of Tesla as solely the producer of bespoke premium sedans and faberge eggs is coming to an end. They are going from a midget manufacturor of 0.36M cars in 2019 to 20M cars per year by 2029. And by their children, you shall know them.
Place your bets. So sayeth the Elon of Mars.