From direct experience: food delivery works well enough for branded, processed and other long shelf life products. It's not bad for meat, as long as you're ordering from a specialist and not a supermarket (and of course there is a price premium). It's not good at all for fruit or vegetables, with current suppliers. Goods are bruised, mouldy, unripe, overripe, etc. It's also useless for bread; you always get yesterday's bread.