techMology, you're wrong about Tesla. They have injection molding machines, die stamping, welding robots, paint shop etc. sure, they buy steering wheel mechanisims and control stalks from Mercedes, they buy brake calipers, etc, as does any auto mfr. They make as much as they can, if the cost is lower and not a standard off the shelf part they can buy for less money than mfr. Tesla manufactures more than most auto mfrs, that's for sure. As far as being a "Software shop" they developed the center console OS and programming, it was not "farmed out", they wrote it and are responsible for it. They also perform final assembly & testing of the battery pack, even if they buy some of the components from other mfrs. BTW, they wind their own AC induction motors, and assembled the inverter as well. a lot of the Model S is made right their in Fremont...
we use standard web browsers to the owners portal, its not typically done on the center console. We are also talking about $70-$110K cars here, if they choose to have 4 years of a data plan included, great, it just adds more value to the car, and one less expense for owners (to complain about), it's all part of their evil plan for world domination