................There are technical limitations to consider.
And Panasonic the manufacturer of the Tesla used 18650 (18 mm diameter x 65 mm high) batteries specified it to be max 2 amp per cell.
You can choose to charge it at a slower rate but "cooking" it a 4 amp will void warranty, Tesla said fine, will do so.
Tesla "chose" to void the warranty because the warranty is BULLSHIT!
You understand that concept?
You have a car, you have a limited amount of space you can use, and weight you can carry, not to mention a maximum price you can pay. You make do with what you have, as Tesla did.
A friend of mine has a model X 100 D, i been riding in the junk more offten than you think.
Yeah, clearly.
BTW, my background is in electronics, and I've been at it for the last 43 years. I think I know a thing or two about batteries.