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You posted " The other apparent change with Tesla is the smaller performance differences between battery sizes than previous. X75D basically same as X100D for example. So, bigger battery is much more of a nice to have than a necessity."
The assertion was that there was some change Tesla made to account for smaller performance differences between battery sizes. I took this to mean some battery pack technical change. Difference between X75D and X100D is only .2 seconds, and I explained how that is almost certainly due to Tesla SW limits to incent purchases of more profitable P100D. Having a bigger battery is better on two counts.
Longer range AND higher performance. Higher performance either now or sometime later when Tesla decides to unlock a higher discharge rate to enable faster acceleration. This is exactly what they did only a month or two ago. With Model 3 for next year or two, my bet is they will limit current on the LR version somewhat, so when a P version is available, they can make it much faster than LR M3 and charge lots more for the P. There may be circumstances 2 or more years out that lead them to unlock the current limit and increase LR M3 performance significantly. IMO, if you pay an extra 9K to get the larger battery, you should get a 'twofer'. Longer range and all of the faster acceleration the extra cells can provide. That said, Tesla for now at least is going to fine tune this to benefit better revenue and profit and that is how it should be to permit continued 50% annual growth.
I think you misunderstood my post. I agree with everything you said here. My point was in response to @ValueAnalyst question regarding LR/SR sales ratio. I pointed to supercharger network maturity and less difference in 0-60 performance of newer (non P) Teslas vs the past (going off memory for prior model performance) that may skew the percentage more to the shorter range model now vs 2013. In basing this off of what Tesla lists capabilities on their website based on what car will currently do. The potential to unlock performance in the large trading battery models is there of course, but not guaranteed. New owners to Tesla most likely won't be aware it's been done in the past either.