I live in a 55+ retirement community is Southern Arizona. When the pandemic broke out, each of the four supermarkets in the area took a different approach. Walmart decided to expand its order online and pick-up curbside. The Kroger affiliate also did the curbside and they offered delivery for $10 with a $35 minimum. Sprouts and Safeway used the Instacart model with no pick up available; in recent months, Sprouts has offered curbside pickup.
At first, my neighbors all signed up for Instacart with Safeway. They became really upset when they were charged Safeway's very high prices PLUS a markup on every product PLUS an Instacart fee. For example, a loaf of Oroweat bread delivered was $5.49 at a time when the same product was on sale at Kroger for $2.49. Most of the neighbors switched to Kroger after a couple of weeks, They liked that the employee not only delivered the groceries but would carry it n to the kitchen.
As for us, my friend has been buying our groceries at Kroger and Walmart for us and eight other households. Every few months, I have been slipping her $100 to cover the cost of gas and the her internet.
Walmart has done the best job during the pandemic. There have been too many shortages at the Kroger store. However, they make great substitutions. Lately, every time I order a quart of half & half, I get a half gallon. l will order the Kroger store brand and get a national brand in a larger quantity.