FAA regulations are written in blood, too - and yet our private aircraft technology is ancient (and likely less safe than modern tech could facilitate) because those same regulations make the cost to innovate astronomical. I would not make the mistake of believing that regulations do more than freeze our tech in a relatively safe local minima.

You're describing the engineering problems of rarely-produced machinery, and seem to imagine that we can't figure out how to do that better, and cheaply, at scale? The potential market for a shipping-container-sized MW-scale power supply is likely huge.