

Sounds like it would amount to much the same thing: you’d need some special wiring, and a kettle made to take advantage of it. No one has made that kettle.
Just curious though, since you seem to understand electricity better than I.
If it’s as you say, and all we need to do to get more energy is to raise the amps, then why do Americans still install 240V lines for laundry machines, ovens, large power tools, etc etc? Why don’t any of those just do what you said, and operate 120V at 30 amps?
I think it’s fair to say that kettles and funnels can be found in non-plastic materials. And I have to admit I’ve never seen an”coffee maker” that wasn’t plastic. I suppose a restaurant grade Bunn machine has a stainless steel basket and a glass carafe, but there isn’t anything for the home. Unless someone is about to tell me I’m wrong, which, this being Reddit, someone probably is.