There’s also the whole “kettles in America take longer to heat up, because America only has 120v electrical outlets while the UK has 240v, and therefore gets twice as much power for the same amperage” thing. That being said, I’m in America and I love my kettle. You just expect it to take 5-7 minutes to heat up, instead of 2-3. If I only want a single cup of something, then yeah I’ll use the microwave. But if I’m going to be making more than one cup, the kettle is my go-to.