" People have stuff."...yep, they do indeed. It 'may' happen that they have little choice. I am just predicting that this is the sort of thing that will need to be factored in planning a trip. Not all trips have the car full, and if you do have a full load, you may need to reserve the type on vehicle that is easier to load. Or one may own a small vehicle for local stuff, and rent/hire something else for the occasional trip.

(all of this, of course, is dependent on personal cars not being cheap or practical, and/or battery & fuel cell technology improving quite a lot.)

I know...we 'may' burn other type fuels...ethanol, etc....but current demand, along with fossil fuel decline, may require a lifestyle change that we can barely comprehend now.

It's good to at least look at the options.