Tesla's Strategy leverages a already massive , well established small cell battery industry ... Laptops , Cells phones , I-Pods, etc ...
It will be a long time before HEV or BEV battery industry grows enough to significantly surpass this already massive and well established battery industry... and it isn't like the established battery industry will sit stationary and wait ... they are constantly improving little bit by little bit.
The only significant down side I see to Tesla' method ... is added complexity.
But , so far they have seemed to be handling the added complexity rather well... this complexity , like other computer chip industries , will most likely continue to become easier, less expensive, and more durable over time.
It will be a long time before HEV or BEV battery industry grows enough to significantly surpass this already massive and well established battery industry... and it isn't like the established battery industry will sit stationary and wait ... they are constantly improving little bit by little bit.
The only significant down side I see to Tesla' method ... is added complexity.
But , so far they have seemed to be handling the added complexity rather well... this complexity , like other computer chip industries , will most likely continue to become easier, less expensive, and more durable over time.