I think you're correct, I think Elon is just talking about catching the condensation water that comes from running the AC, so when you are running you car in a high temperature environment and get stuck or something you get a liter of water to stay alive. Probably beats drinking your own urine.
As soon as all these electric vans come on the road a lot of parcel delivery vans will probably go to the scrapyard aka sell for cheap.
Not sure how often you go camping but if not much, an old step wagon might be the cheaper option for sure.
Let me know if it worked as Saskateam said. I have ordered a single motor reservation 5396, so I don't want to loose it, but I don't want to wait an extra year, since they changed the order of production.
I don't think they should use the X for it, they won't have the excuse of bumping an arrested person against the roof while putting him handcuffed in the car.