It's a bit of No True Scotsman. USSR (and other places) did an earnest attempt to build communist societies based on Marxist tenets. They went full in: class war, expropriation, even the attempts to abolish money and family. That it failed after decades of attempts was not for the lack of trying, so maybe at this point it's worth reconsidering viability of the idea.
Interesting point about the grassroots origin. When I read the accounts in early 1990s it was alleged that a whole factory of a minor computer manufacturer in the USA was bought and relocated to Pravets. Including the furniture, broom closets and trashcans. Though am not sure if computer designs were also allegedly in the deal.
Also that Bulgaria invested into some semiconductor manufacturer in Singapore to maintain uninterrupted access to the components.
Often undertaken by subsistance miners with hand tools .. eg: Coober Pedy is surrounded by a rabbit warren of tunnels 30 ft down and fanning out following opal.
Admittedly that's "soft" rock, but 30 foot is shallow underground mining compared to major league underground mines and open cut super pits.
In Reddit hand wringing land where your 3-gal homeowner air compressor gets called a bomb, yeah sure it's a major undertaking.
15-30ft holes in the ground can be constructed with bog standard earthmoving machinery that isn't even "wide load" so it's "within normal capabilities" by professional or military standards.
I just replied in kind and with a statement of fact, you legit have nothing to complain about. You want a better attitude - work on your manners. Not going to address your hole digging trivia further: I know how it works and I know why the military doesn't do that.
Surprising fact I just noticed about the next Moon landing attempt -- it'll take up to 22 launches to get everything into space needed for the attempt.
That's good, actually. We need to develop the capability to stage/assemble in-orbit, as this would relax a lot of hard constraints on size and complexity of the missions.
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