That's a really strange thing to see here on HN. Where did you get this idea?
BTW Europe having 3-phase AC to the home is brilliant. Wish we had that in the U.S.
Why is this strange? I see this kind of ignorant nonsense here all the time.
This site is absolutely full of software people who, because of Dunning-Kruger, think they're experts at everything technical. Electrical engineering isn't that far from the software world (computers are electrical, and their design is within the EE world), so software people frequently think they're experts at anything EE when in fact they don't even understand Kirchoff's Laws, much less the realities of modern-day AC and DC power transmission.
There's been multiple discussions here in recent months with these people advocating absolutely idiotic stuff like a whole-house 5V DC supply, showing they don't even understand Ohm's Law.
On a side note, it's very frequent that I see posts here from people who apparently have never heard of an ad-blocker, yet are complaining about ads.
Are there three phase sockets available? I'd think you could build things like high power audio amplifiers or power supplies at radically better price points, if this were actually usable from the wall in places.
If you're AC all the way, there's never a need to rectify your generator, either.
And then there is the voltage conversion, which traditionally happened on the AC side (inexpensive and simple AC transformers are generally why the transmission and distribution systems are AC). Modern power supplies allow for buck/boost on the DC side.
USB-C power supplies are above 90% efficient. [1]
[0] https://eepower.com/new-industry-products/huawei-claims-most... [1] https://www.ti.com/lit/ug/tidudw2c/tidudw2c.pdf?ts=168350042...