Now that 100kWh S is in production, time for some reflection. Tesla introduced the 85kWh in 2012 and it took 4 years to get to 100kWh. A 15 kWh increase over 4 years. Or about 4% a year. Even Nissan and BMW were able to increase from 24 to 30 over the same period or about 6% a year. A bit disappointing isn't it ? Agreed from a cost perspective Tesla has made amazing strides, more than what was predicted. In 2011 we were told getting the price down to less than $100/kWh is more than 10-15 years away but now we know Tesla will get there in 5 or 6 years thanks to Gigafactory. But from an energy density perspective the progress is a bit underwhelming.