Here you go, those are $100 bills.

When I talked to one of our VAR's he said that one of the local hospital chains was one of his best and worst customers, best because of all the expensive gear they bought, worst because they were so demanding. They actually paid to have trenching done to make sure that their backup link at one facility went out a different CO which was on a different uplink facility (ie truly divergent paths with no single mode of failure), and that was just for PACS, not telesurgery.

I certainly can't argue with that, there were indeed.

Couldn't find any numbers for 800kv AC, the Tepco 1,000kv AC line is >5%/1,000km so the extra 10% from 735 to 800 isn't going to help much.

Ah, I had forgotten about 6-15R, whenever we deal with 240V it's always L6-20 or L6-30 twistlock or C13, neither of which would work in a kitchen. I do see you can get 6-15R in GFCI which is good since that's required in kitchens.

Wouldn't pass inspection in the US since they're not classified in the NEC.

The parasitic losses of DC over long distance is reason enough that it's not done

Siemens quotes 3.5% loss per 1,000km for +-800kv DC vs 6.7% for 735kv AC systems, exactly the opposite of your claim. I think I'll trust one of the biggest names in power over someone with a free bitcoin scam in their signature.

"I understand what you are saying, but the public are not the rightful owners, either. After the patent or copyright expires"

If we are splitting hairs nobody is the rightful owner before the patent or copyright expires either. Neither of those things confer ownership.

I am bothered by copyrights lasting longer than patents or anything for both.

"If copyright governs interfaces, that part of the law will keep the government from stealing IP away from its rightful owners after twenty years."

That's a pretty insane statement. Copyright doesn't grant ownership and there are no rightful owners. Copyright is government imposed limitations on the natural rights of everyone else. If you write a book, you own THAT book and that particular copy of it's contents nothing more or less. I have the right to copy any software, api, song, movie, etc limited only by your right to try to stop me. Copyright is the government interfering with those rights.

Practical consumer-level devices do well to hit 20%.
No, 80% efficiency is pretty much the bottom of the barrel in switching mode power supplies, 95% from 20-80% of rated load is doable for around $200 for 1kw loads.

You're going to install a NEMA 14-30 and use a conversion cable to run your European kettle?

And what is the system efficiency of
Grid AC -> Battery DC -> House AC -> USB DC?

Often is a bit of a stretch, less than 1% of all high voltage distribution lines are DC.

HVDC works well for long trunk lines between a distant large power source and a population center, but it much less useful for a grid system with many interconnect points. That's why the primary usage has been between hydro plants and distant cities and for international interconnects (especially where the local grids of the two sides do not share a common standard).