Because I want a glass one and the glass one I have has a plastic top to make it whistle. I therefore don't use the top because of the plastic. My wife won't boil water for my tea if the device doesn't make a noise and or shut off. And if I make my own tea with the glass kettle, it will invariably live on the stovetop. That will aggravate my wife. Given what's up with the electric kettle, I'm not going to go get a stainless one. I suppose I could get an enameled one. See previous point about shit living on the stovetop. Also, the electric is sorta cool because it has multiple temperature set points for different beverages. Why can't they make an all glass electric kettle?[/QUOTE]
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