If this pick-up format remains as the biggest part of the Pie of Food Home shopping in France (5 times more than home delivery in turnover) , it is because it is the cheapest and quickest way to buy food on line.
Same day food delivery is far from being the rule in big french cities as it remains expensive. And as long as retailers will work with professionals and not with individual people like Uber or Postmate.
Awaiting legal and cultural acceptation (or revolution ?), Drives will lead the market and might be the place from which Same day delivery emerged.