Every single home in the US has 220 already. They're taken from 220 to 110 at the breaker for common outlets, but many large appliances (and EV chargers) already are 220.
Worse kettle performance is unfortunate. But better safety is a nice side effect (in particular as the NEMA connector the US uses is dangerous/poorly designed/bad, even with the ground pin).
If houses in the US are 240V, than houses in Europe are 480 (or rather, 400V because it's usually triphasic).
The voltage arriving at the building is kind of irrelevant to the discussion. The question is whether a connection could even sustain the house network at double the voltage with larger appliances than it was designed for.
> The voltage arriving at the building is kind of irrelevant to the discussion.
My post talked about voltages arriving at appliances in US homes. Many appliances are designed and in fact receive 220 V. There's even a common (i.e. near every home) plug/wiring/breaker standard for 220 V.
You're the one trying to steer the discussion towards "arriving Vs. using" whereas the first line of my post was expressly about the active use of 220 V in near every US home today (tumble dryers, ovens, central heating, EV chargers, shop equipment, etc).
> The question is whether a connection could even sustain the house network at double the voltage with larger appliances than it was designed for.
I don't understand what you're trying to say. A full end-to-end circuit has to be built for a specific voltage and amperage. If you want to turn a 110 V into a 220 V, you have to re-wire from the breaker otherwise the wiring will overheat and catch fire.
Worse kettle performance is unfortunate. But better safety is a nice side effect (in particular as the NEMA connector the US uses is dangerous/poorly designed/bad, even with the ground pin).