> * But my understanding is the US 110v thing is kinda limiting, and 220v is way better.*

You can have 240V for any plug in the house in the US: install a double-pole breaker at one end, and a NEMA 6 plug at the other.

The US uses 240V in a number of situations: it's used for kitchen ranges, clothes dryers, external AC/HP units, and recent EV charging. Are there other places where it's needed? (Personally I wouldn't mind having it for tea kettles.)

But how many other applications need >2000W of power delivery that 220V would allow?