The US has 240VAC though it's just not a common household appliance circuit. My induction cooktop (in Australia) draws 7kW and is supplied by a dedicated 20A ci

The US has 240VAC though it's just not a common household appliance circuit. My induction cooktop (in Australia) draws 7kW and is supplied by a dedicated 20A circuit for it (because that's what you over-spec the wiring too). It was put in to replace a gas cooktop which was there when we bought the house, and vastly out-performs that unit in speed and heat output. If you converted you'd be pulling a dedicated circuit through anyway - no one's tying induction cooktops off to just whatever line you already have. The one area gas can be better is if you're doing wok cooking, but that's more to do with how wok's are shaped and heat up then any limitation on the ability to get heat into them (I've not been able to find one of the adapters which apparently exists to solve this).