In the very first edition that was the case only with the 40kWh version. The 60kWh one was fairly popular and battery prices were much greater back then, so a

In the very first edition that was the case only with the 40kWh version. The 60kWh one was fairly popular and battery prices were much greater back then, so a physically different battery was justified. Only later did the 60kWh version shrink enough in sales for Tesla to apply this trick to it.