If the new packs are 75s versus 70s by utilizing less blanks, then how much extra weight would an MS with the 75 be carrying around not utilized? Enough to impact range a bit over time, e.g. an extra 100-200lb or so?
Seems like just filling some of the unused blanks that exist in the 70 versus 85/90 is the easiest way for Tesla to create a 75 pack for now...
Heck, if they offered it for those of us with an older 70D as an upgrade, to pop in a new pack, then I'd consider it at $2000-2500. 5 more full usable kWh of range...
-T