Unfortunately for every tea drinker in an American hotel, most coffee makers (at least the drip kind) will make any water boiled inside taste like coffee, unless they’ve been used exclusively for plain boiled water. Maybe a combo tea/coffee drinker wouldn’t mind, but I’ve always found it intolerable.

But it’s a good point about the grid - we have plenty of appliances for coffee that are principally glorified water boilers, and there’s no evidence that our appliance voltage has hampered their popularity at all.