Aren't they horrible? The somewhat authentic ones are stale; the directive now is not to refresh or replenish what they do not sell, so they are often more than past the freshness.
Awhile back I was standing in line at Sommerfest just to buy a bottle of water. A foursome of older Americans was ordering a sausage on a bun which is served with Sauerkraut. They were arguing endlessly with the CM, demanding that she substitute French Fries. She explained over and over that they don't serve them there, and offered up alternate locations which did serve them.
They finally left after yelling at her, and when I ordered she told me that they deal with that all day long. Frankly, even if they did serve 'Pommes' or 'Frites' the German way is with mayonnaise, and not with ketchup, so I doubt that they would have been happy with that either.
The customer has driven this change. The demand is for 'familiar' foods, and the more authentic ones didn't sell. Blame the visitors, not the vendors, for having to adapt.