Location location location. The restaurant is in the middle of the main shopping street in the middle of the city, on a street called "bank", in the part called center town. We can make an educated guess that the rent is not exactly going to be cheap.

The article reads very different when the location is known. Tourism is significant effected. City shopping is significant effected. People who work in expensive offices is exactly those that often have the option to work at home. All the talk about margins feel like distraction of the fact that restaurants at central shopping streets are going to suffer. It is thus questionable if the article has anything to say about the industry as a whole.

That definitely explains a lot; I thought $10/lb for the type of meat they were describing was kind of crazy (for someone complaining about margins, anyway). ~$6.30 USD/lb feels far more sane.

Here in Austria, a Döner is usually 2.50-3.50€. I would be surprised if it were more expensive in Germany (expect for tourist traps)