I think this is their biggest weakness: grocery stores are all starting to offer this service, on demand. Grocery stores don't even need to devise the meals the

I think this is their biggest weakness: grocery stores are all starting to offer this service, on demand. Grocery stores don't even need to devise the meals themselves, they can outsource that to a third party, and just handle the ingredient gathering component. On the other hand, this improves the utility of grocery stores greatly!