I might've missed it, but where did you get that info? The posts above mention they are getting CH05. CH05 = 48 amp charger. CH04 = 72 amp chargerBut why would only the 75Ds get the High Amp upgrade and not the 75s and remaining 90Ds?
When I look at cars added to TeslaInventory.com over the past month, the 75s with a 72 amp charger only represent less than 7% of the cars getting a 72 amp charger in the US. There are actually more 75 than 75D with the 72 amp charger. The 90Ds represent over 62% of those getting the 72 amp charger. The other 31% are 100s.
When looking at 48 amp chargers, 75 and 75D represent over 60% of cars.