A lot of people do this anyway because of product choice. For example, most people I know that have transitioned to more cooking at home as they've gotten older

A lot of people do this anyway because of product choice. For example, most people I know that have transitioned to more cooking at home as they've gotten older have favorite products which they grab from Trader Joe's, some bulk items from Costco, produce from certain grocery stores etc. but they know that you shouldn't get produce from Trader Joe's or a Target for example. And then there's availability: some veggies are not readily available outside of asian grocery stores and meat prices can vary widely from store to store.