"Inkjets are standard paper printers."

You can use them for that, as the manufacturers intended, but they can also print on sheets of PET, which is what beverage containers like water bottles are made of, and using inks with metallic and graphene particles they can print conductive traces to make circuits, and solar panels.

They can print on anything you can feed through them ink will stick to. They can be used to print living cells onto scaffolds of cartilage as well, but the print head must be freed from it's enclosure, and the scaffold won't feed through a paper carriage system, obviously. Tests reveal that print heads with smaller jets better control delivery of cells, producing better results. Testing continues.

"...producing photovoltaic cells is still a "globalism"-dependent thing..."

Not since 2008. If you search you will find links to published papers in which ordinary inkjet printers have been used to produce solar panels, amongst many other things.

"...size of the printers determines how much you can do with them."

A couple years ago Creality came out with a 3D printer that used a conveyor belt as the print bed, essentially enabling parts to be as long as you want.

"...that could all be horseshit..."

It's not. Pyrolysis is a method to break down organic matter using heat in an anoxic environment so that the hot hydrocarbons don't burn immediately, but can be distilled, as that kid is doing*, or can be piped to an ordinary internal combustion engine while in a gaseous state. During WWII thousands of people across Europe had no access to petrol to power automobiles, so they used pyrolysis to make wood gas and ran their cars off the carbon monoxide gas produced by smoldering wood. People still do this today, and there is an American company selling complete turnkey wood gas generators that can drop into the back of a pickup. The FDA produced a pamphlet during the war showing farmers how to run their tractors off wood gas, due to fuel shortages.

"...solar and wind?"

Yes, and other mechanisms too, such as wood gas and geothermal. A couple feet down the soil is always ~55 F, and there's also passive solar.

"...there's regulation involved in that..." Jurisdictions vary. Regulations only matter when you have the luxury of caring what someone else says you can and can't do. In an apocalyptic catastrophe, as in WWII, they won't matter much.

"My father's neighbor built and ran a aquaponics greenhouse with fish..."

I have just finished the greenhouse structure, have just acquired a suitable tank for some fish, and some food grade plastic barrels for filtering waste water through the hydroponic medium. I'm still working on the innards of the system, but hopefully will be up and running sometime this winter.

"...Oct 1 they announced they had gotten a 10x performance increase..."

That's incredibly good news. These are all relatively new techs, and early adopters and hobbyists are trying all kinds of things. For example, if you're familiar with wire feed welding, there's people trying to mount those in 3D printers. They are very hot, though, and aren't very precise. Yet. Using metals besides steel (brazing instead of welding) might be a lot cooler and easier to manage. The fervent ferment of development is ongoing. AI, particularly, is well suited to automating repeatable production tasks and maintenance, and some very powerful FOSS AI has been released in the wild coders might adapt for automating a variety of DIY production tools.

Chickens, ducks, and etc. are all very important. There aren't many foods as nutritious as eggs.

Edit: *Pyrolizing plastic produces horribly toxic gases. Wood is much cleaner.