Yes it is. That is why Tesla dropped it, if you actually think threw it, it makes no sense for most cases. JB Struble just gave a great analysis of this at a S

Yes it is. That is why Tesla dropped it, if you actually think threw it, it makes no sense for most cases. JB Struble just gave a great analysis of this at a Standford talk where he explained why the dropped it. It actually makes the vehicle more complex and importantly heavier. It also prevents further improvement, Tesla just showed of their new Cell-to-Structure concept, where the cells themselves have load on them. This fundamentally is incompatible with fast swap. Such a architecture is really great because it negates the 'penalty' of carrying around a battery compared to an ICE vehicle. In fact you might end up lighter, because you don't have the heavy engine and the battery is not so much heavier then the structural steel you would have used otherwise. You can charge trucks during breaks, or during loading and unloading.