I post on both this forum and the Tesla.com M3 forum. The Tesla.com forum is ridiculously censored. Take a look at my latest post that got censored: "The S and X use the older battery; which probably costs more/kwh (also they are "luxury" cars, the M3 is the "affordable" mass-market car). The projected falling costs are based on the new (2170) battery. But most importantly, my comments are based on costs, current and projected, for the M3's 2170"