I've seen commercial products that use socketed devboards inside. If anything, it's just an indication that the hobbyist and professional spaces are slowly converging.
A UPS-style grid connected inverter (with phase balancing) would be significantly more complicated by also significantly more useful. More in the critical/specialized part category, rather than near-commodity (like MPPT/BMS)
There is no "who", once stabilizing institutions 'fall' the only remaining option is social pressure (which can come in various forms) but that does require a critical mass as it's very much reliant on network effects.
Having worked on compression algos, any NN is just way to slow for (de-)compression. A potential usage of them is for coarse prior estimation in something like rANS, but even then the overhead cost would need to carefully weighted against something like Markov chains since the relative cost is just so large.
Individuals pay like 25-30 Euronth contribution, which is tax deductible. Employers can pay a lot, like 10% or more, which is often going to a social security fund.
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