What if you need more cultural foods? Costco and Aldi only have very generic foods. Costco has the odd frozen food and snacks from other cultures, but otherwise it's just a lot of run-off-the-mill type food.
Good point. My comment was mostly about “essentials”. If your “essentials” includes Asian or south-Asian essentials then we have those too and love going there almost as an excursion. And those stores are also small, to the OP.