That looks far too polished with locked in specs for them to not have any prototype. I’d trust companies that have actually made a product that has a janky Linux implementation that’s improving, than one that doesn’t exist yet relying on crowdfunding.

Ackshually, the plane is the matter jar. It’s just super uncomfortable for the passengers if the pilot doesn’t get the maneuver just right in the air, so they land and do it there instead. Sometimes they’ll fly along the equator and do it slowly if they’re going across the Pacific, e.g. USA -> Australia, instead of USA -> Chile