Mad Max notwithstanding, you can only store gasoline less than a year, so it's not like the alternative is really any less reliant on civilization.

People who truly care about that will likely be using diesel instead.

500 miles is fairly substantial range. I can see this being useful for a very wide variety of use cases, but obviously not those longer-term multi-day excursions into the wilderness.

That said, it is a truck, and maybe someone (perhaps even Tesla) will develop a modular LNG/propane/diesel generator unit you can put into the back of the truck for purposes of range extension. I realize this is inefficient, not environmentally friendly, and going in the opposite direction of what the electric car is supposed to do, but its also only applicable in those extreme edge cases where you need to be away from the grid for days or weeks.

You can also easily google that photograph of a Mitsubishi MiEV being charged on the roadside by a Honda gasoline generator. That needs to be scale up a little bit, but it's possible to charge electric cars like that - inefficient, but enables driving out of the range of the electric grid.

However, 99 % of drivers of a "truck" like this will be commuting between a suburban home and an office.