[simonh]

I think the reason is that some foods are cheap enough in materials, quick enough to prepare and maintain their edibility in transit that they are conducive to home delivery. Those foods have therefore been available for home delivery for some time.

Pizza has very cheap ingredients and has a consistent highly transportable form factor. A kebab (Schwarma) contains a lot of expensive meat and will fall apart in transit. Therefore pizza has long been available for home delivery and kebabs haven’t.

I suspect a lot of restaurants are willing to stay open using deliveries just to stay open, even if they get no profit of make a loss, just to stay open. At least they get to pay some of the rent, keep staff and hopefully keep a customer base until they can open properly again.