I’ve been ordering deviations of the standard menu since I was introduced to McD in my teens and ever since I started paying for my own food I don’t really order basic menus but instead mix and match to my wims for the moment. I’m weird.
Can not remember ever getting a wrong order but I’m also aware my local McD has less items on the menu than, per comparison, the one from the US market.
So, perhaps a combination of luck and good service on my part?