it could be that the UK is mostly dense enough. there are a few very dense parts of the US where you've been able to get pretty much anything delivered (eg, NYC

it could be that the UK is mostly dense enough. there are a few very dense parts of the US where you've been able to get pretty much anything delivered (eg, NYC) for a long time. I don't know much about grocery delivery, but I can think of two reasons offhand why it would be more viable. the first is that the delivery window for groceries is much more forgiving. if you have a cooler, you can keep refrigerated/frozen items at the correct temperature indefinitely. this allows you to load a lot more stuff in the vehicle and plan a more efficient route. the second is just a guess, but I'd bet the typical grocery order is larger than a typical food delivery order, so you make more money per stop.