I would want NMC in Model 3 in the smaller pack size to allow for a longer battery lifespan. NMC allows more cycles than NCA, nominally - if you add the secret sauces that Panasonic does to the NCA, you do get more cycles - but not like NMC cycles. NCA was going to be used in PW 1.0 "Backup Battery" solution, which was cancelled. NMC is/must be used for daily cycling. Now, for cars, not everyone cycles daily and NCA works out (unless you are Uber'ing and driving 200+ miles daily).