100-150 years down the line would be too late - by that point democracies will have crumbled and modern arms will be held only by the elite and governments.
Would be like fighting a current army with bows and arrows.
Yeah the major changes aren’t 150 years down the line, far closer to my 20, no more than 30-40. We already have affordable metal AND bio organic (ie print out a new working heart) 3d printing meaning all we need access to is raw materials. So you won’t buy cheap %*^* from a factory in the near future that needs to be stored in massive warehouses, you’ll just look online and say “I want a new speaker” (or a kidney) and either your printer will create it (if you’re wealthy) or a central printer hub in your neighborhood will print it. There’s very little need for human “work” other than in the intellectual property to design the widget and in the low level mining/biofarming jobs to create the raw materials.
In 20 or no more than 30-40 years, there WILL be miners to get the raw materials although a lot of the refining/processing will be automated. Then as much of the transportation system will be automated by then, very few humans involved in the transportation of refined “raw” materials (things like steel ingots) to the 3d printing center center. You sitting at home will order up a television and the 3d printers will take a design (designed in part by a human at least for awhile) and print it out whereupon it will be delivered via an automated transportation system (partially solar powered drones or something else). Between raw materials in the earth to finished television, only a handful of people will be involved and most in the mining portion as it’s still too cheap to use cheap human labor for that along with explosives and heavy equipment.
So who will make money? Primarily the owners of the automated 3d printers, the owners of the transportation robots/handful of human operators, the owners of the mining and other raw material and the owner of the intellectual design of the widget that’s bought.
Unless there’s a way to keep the demand for widgets up like instituting a universal minimum income, then that system will end relatively quickly with all money in the hands of the few and the rest of us starving or just slaves.
I’m working at making sure I don’t become part of the cog system by making sure I’m an owner in various medical companies as even cogs go crazy or need a new heart. So hopefully I’ll be on the opposite side of you poor cogs without ownership in a continuing business, but I will be personally voting to try to get that Star Trek society to happen instead. I’d enjoy sitting around drinking my synthesized alcohol watching a brass quintet.