I remember reading something about Americans not really having kettles ages ago, and that boil water thread just reminded me of that.
Do Americans have kettles? here in Australia they are a common household appliance but I guess not in America? I also remember hearing that they do have them as well which is why I'm not sure.
Apparently some Americans use the word kettle for something I would call a pot/teapot which is interesting. Just In case that's you I'm referring to these electric ones that look like the image below.
I grew up with an electric kettle as the most used appliance after the fridge, so moving to the US was a shock because most kitchens there just have a stovetop one or none at all. The reason is partly voltage, since 120 volt outlets take far longer to boil than the 240 volt systems in Australia and the UK, so people grew up using the microwave or a pan. You are also right that plenty of Americans call a teapot a kettle, which caused confused conversations. Have a look at this page if you want context on regional brewing habits. For me a proper electric kettle is non negotiable.
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My American in-laws never owned an electric kettle until we moved over and brought one, and now they use it every day for coffee and tea. Before that they just boiled water in a pot on the stove or used the microwave, which honestly blew my mind coming from Australia. From what I've seen, plenty of Americans do have kettles now, but they're more of a specialty item than the everyday kitchen staple they are back home.