That's the thing, yeah. In Germany, this changeover started just a few years ago, and it has only been dominant for around two.
About the regional differences - I remember visiting an Amsterdam restaurant in the mid-2000s that still served the food in styrofoam trays, many years after those had been phased out in Germany. And being able to pump my own ketchup and mayo into little waffle cups in another one in Denmark. There are quite a few regional differences.
> In Germany, this changeover started just a few years ago
In Switzerland as well, yes. And I can't remember which burgers or items it were, but I remember seeing items in a german McDonalds which I've never seen in Switzerland.
In Italy you can order a couple of different beers, even from self-service terminals. In Switzerland I remember them only being available when ordering at the counter, and they only offer one kind of beer. Not that I care about beer at McD, just something I noticed.
About the regional differences - I remember visiting an Amsterdam restaurant in the mid-2000s that still served the food in styrofoam trays, many years after those had been phased out in Germany. And being able to pump my own ketchup and mayo into little waffle cups in another one in Denmark. There are quite a few regional differences.