During the late 70s and early 80s I spent a couple of years with a food budget of less than $50/month, in today's world it would be like trying to live on less than $182 per month. Think of living on Popcorn, Ramin noodles, Beans, Minute Rice, and cheep canned biscuits. Being hungry made me tend to try to keep food on hand.
Over the last 30 years I have always stocked some food in the basement, when I started we had a family of 5 and I stocked for about 3 months, then I kept adding on staples (mostly inexpensive stable stuff, beans, rice and some canned foods). As my finances improved I put any extra I had into food storage. As the kids left home I didn't change my food storage targets. Then when COVID hit, I heard the stories, stood in 2 hour lines to get into half empty stores. I stopped and looked around at what I had at my disposal, I looked closer and realized that a lot of my food was old. So we made a game of it, we set new food storage targets based on the new reality and we started eating down the old food, using more of the rice, beans, and wheat that we had in the house. We set a strange new goal, not to go shopping for anything for 6 months... Once we started knocking down our old food stores below our targets we started to rebuild our stores, but we kept it separate from our old food, we ate the old and just kept stocking up on new food that was dated and stored in staging areas. Once we cleared off a full set of shelves we restocked them with the new food stuff. TP was a problem at first, but I found you could order that online and have it delivered free (with a minimum purchase) but they had limits. But the limits applied to a single order and I started doing an order every 3 days until I was fully stocked (at our targets). We also doubled our long term dehydrated/canned foods like milk, cheese, flours, and diced/sliced potatoes and veggies. During this time we reduced our fuel consumption by about 80% and we expanded the garden to where we can get a consistent supply salad stuff and tomato products. Tomatoes were a big surprise, we were able to get about 50 pounds of tomato's off each plant during a season. We canned a lot of our meats and vegetables to protect against the dependence on freezers, expecting the grid to become unstable in the future.
Today, we are down to just buying what we have used, much smaller quantities but we don't have any fears when we talk about food shortages (unless they have the potential to go beyond our target time. I do have 1 child within driving distance of us so I base our food storage targets on 3 adults.
When I go shopping now I focus on fruits, berries, bananas, cheese, eggs, and some milk. Meats and chicken are only bought in response to what we have consumed or plan to consume in the next 2 weeks. I do monitor product availability and prices, but it's only to stay in tune to what is going on around us.
Being prepared and expanding our capabilities (our preparations are not limited to food storage) does provide a calming effect and gives me peace of mind.