Could be many things, • Better techology (that still needs to be R&Ded) makes it more efficient and net positive in the future. • Prototype v1 is a required s

Could be many things, • Better techology (that still needs to be R&Ded) makes it more efficient and net positive in the future. • Prototype v1 is a required step towards v2(-v3...vn?) that actually accomplishes the goal. An example of this is SpaceX's Starhopper -> Starship. • Some economy of scale makes it work at some point. Example, put a single box in a big ship from Shanghai to LA, cost of shipping = millions of $; vs. put a million boxes in the same ship, cost of shipping = a few $.