I don't have one, and don't know anyone who has one. In fact, I've never seen one in an actual home. We don't drink tea the way Britain and other former British possessions do.
(in my case I don't drink a lot of hot tea, but I do drink a lot of iced tea, and a worthwhile amount of that is larger than what most kettles can do -- I typically brew a gallon or more at a time)