I don't mind what it's called - it's wonderful either way. When I was a little girl I remember fantasising about a house with macaroni cheese walls, which you could dig a spoon in and eat a bit at any time and it would magically rebuild itself. I wouldn't have given tuppence for the witch's gingerbread house in Hansel and Gretel. My American daughter-in-law still loves Kraft Mac'n'Cheese and has been known to eat it straight from the can as she did as a child when nobody was looking (she is amazingly fit and slim, unlike me!). It's a cosy orange colour, easy to reproduce in Scotland where much of the basic cheddar you can buy is coloured orange. And on the subject of Scotland, macaroni pie here is like a Scotch pie - it's macaroni cheese encased in shortcrust pastry. You get it at the butcher's and eat it out of the paper bag, particularly if you're a teenage boy (which I'm not).
Yes, mac'n'cheese is an Americanism, and that serves to differentiate cool, on-trend food for millennials from fuddy-duddy old-fashioned school dinners, but the pleasure for those of us who love the cheesy flavour and the silky texture is just the same whatever it's called.
Pity I'm now on a low-carb diet ... but courgetti in a cheesy sauce made with butter, Philadelphia, some single cream and grated cheddar with just a teaspoonful of cornflour to hold the sauce together is pretty good ... and since its quite rich I am not tempted to scoff it all down in one sitting.