Unnecessary though productivity outpacing demand as far as I've understood it.
In Marxism what they call "full communism" is envisioned to be the "final state of humanity" where productivity is described to be higher than the sum of needs and wants - everybody can help themselves to anything from the warehouses. Obviously very utopian, and I'm not sure there ever was any detailed analysis on how a society a would actually function in "full communism" - but I don't think the economics of The Culture would be that far off if you would describe it to someone of those views. Early Marxists were much a bit more practical, more focused on critiquing the practices of their contemporary societies than envisioning the details of their utopia.
Economic systems of the 1800s doesn't really make sense in a space based, post scarcity society - economics is after all, the allocation of scarce resources. But I would argue that the ultimate aim of the socialism as envisioned by Marx wasn't government control over the means of production (the "dictatorship of the proletariat") but rather "full communism" where the eventual aim was to make resource allocation unnecessary, which in a way, does hint at a post scarcity society. So I can see the connection to the original Marx. Less so with the so-far practical implementations of socialism.
Tesla is free to not sign a CBA, and union members are free to not serve Tesla. Swedish labor market is very free (as in unencumbered by laws and government intervention).
That’s fine, assuming we pass laws mandating that signing keys can be controlled by end users. Otherwise we end up where no-one really owns their devices any more, every device would be merely temporarily rented.
True, many are indeed using ARM (in house designs are also more popular than you might think in deeply embedded SoCs), but a lot of companies would love to be able to throw out ARM due to licensing cost & hassle, or at least have a viable option in RISC-V to throw at ARM at the bargaining table.
There's gazillions of embedded processor cores in every device you own. Your SSD, network card, phone, motherboard, router, TV, modem, car, fridge, you name it all have multiple processor cores running some piece of firmware you never see. RISC-V has a pretty good value proposition for those: an open standard with no licensing costs with a rapidly maturing software ecosystem. To say that RISC-V will only succeed if you can attach a monitor to it only betrays a very narrow view of where processors are actually used.