Why does the article say it's 3 nautical miles off the coast? If you just zoom out a bit on google maps, I measure the mainland to be less than 1000 ft. away.
I wonder if they just recently decided to go with the CM4 module and failed to update the specs to match. The video shows them using the CM3 module, which does have lesser wifi/bt specs.
My only wish for v2.0 of this would be an integrated touchpad so I don't have to use a separate mouse. Similar to a Logitech K400 wireless keyboard. I don't know how many times I've been in a situation where it's challenging to find a surface to use a mouse on when I'm working on a Pi project. Workshop, electronics bench, just doing something real quick on my lap, etc.
That's not what was said. A "single person" cannot make a lead pencil. I agree. Ask yourself whether the Primitive Technology guy could make a pencil in the middle of the Australian rain forest. He can make a lot of great things, but in order to make a pencil, he would need additional tools, and those tools would be made by someone else, hence the statement that "a single person cannot make a pencil."
Note that multiple times in history, due to war reasons, societies independently developed making pencils because they did not have access to the resources, and substituted other resources.
I'm guessing here, but it could be possible that the actual heating of the filament is done entirely with the laser, and the job of the heated nozzle is simply to keep the filament at temperature all the way until it is extruded. It may have not been possible or feasible to combine the laser heater and nozzle, hence the need for both parts.
When the Laser heats the filament, it's 1.75mm in diameter, so to get it down to the 0.4mm diameter for extrusion a nozzle is still required which also needs some heat so the plastic doesn't resolidify.
It's not the ground surface that's causing the reactive lifting force, it's simply the thrust caused by the water jets. Unless the ground ends up blocking a jet, the shape and orientation of the ground shouldn't have an effect.
The car most definitely has software controlled anti-lock braking equipment, and likely has software controlled electric brake cylinders. Both of those things could plausibly be updated via an OTA update.