I don't think I quite follow when people say going to the grocery store every day to get food to cook takes awhile.
I go to the grocery store on the weekend, buy everything for the next week, and that's it. Very rarely do I find myself in a grocery store anytime else during the week. People actually go to the store each day?
I actually go everyday and select what's fresh/on sale/looks good. I never have an idea of what to buy until I enter then I usually buy the necessities (e.g. milk, coffee, tp, chocolate) and what I want to cook with that evening. Once you learn between 30 and 40 dishes, you lose the need for lists and can make decisions on the fly.
I'm actually disappointed because where I lived in Stockholm, I got off the subway, went up the escalator and had three supermarkets right there (one did well with meats, one with breads and the final with veggies.) In Frankfurt, Germans won't spend as much money on fine food so the selection and number of stores is much lower.
I am, however, thinking of getting a fresh veggie box delivered to the apartment once a week because it's all local ecological/environmental veggies and wines, which would take a lot of guesswork of figuring out which local farms do what with their produce.