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One time, I was shopping for a specific item. I couldn’t find it on ebay, Amazon, walmart or etsy. Then I went to some smaller retail site (they also didn’t have it), and an Amazon ad for that item popped up. I clicked the ad, and it took me to the item page.
Amazon search (at least at the time) was so ineffective that I couldn’t find it, while their ad data gathering was so complete they knew that I wanted that specific thing.
American kettles are significantly worse than British kettles. They run at lower voltage and lower amperage, so they take much longer to boil water.
Given the choice between using a multipurpose microwave to do one more thing, and buying a separate appliance that is no faster, choosing to use the device you already own is entirely appropriate.