Macaroni generally has an association with cheap Mac & Cheese box meals. I do agree that, on a broader scale, they are both pasta and not really functionally much different.

I was informed that Japanese people often referred to these as “Macaroni Westerns” which I think is even even better as it effectively also implies that they are cheaply made

SteamOS 1 and 2 were Debian based, but SteamOS 3 (the version that launched with the Steam Deck) is Arch based.

Apple

No idea. I actually dug up the original trailer that apparently got everyone hyped, it came off as very basic.