We're buying lots more stuff online this year. Actually, anything I want I have to look it up online and post a picture by email to my wife so she can find it in the store if we go out and get it. She doesn't want me going into the stores because I'm more at risk.
I've been in a 2 person household since January, 16 miles from the nearest store, 40+ miles from the nearest big box store, small city

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When Covid kicked off about March through now I've been the sole shopper. Either SWMBO figures I'm more expendable or more likely to fight it off.
But there were a couple of months there that the biweekly shopping to Walmart for groceries meant a complete scrub down, change and wash of clothing upon return. All incoming and deliveries had to be wiped down with Clorox. It was like coming into a clean room.
She used to do most of the grocery shopping, usually going about twice a week, eating lunch while out ($10 right there). I've pared that down to about twice a month with NO meals out for me (a $40/month savings).
I use Amazon a lot. I find their prices competitive and if not, I order from eBay or another on-line retailer.
Just stupid for me to drive 50+ miles round trip to get to town. I figure a round trip on the truck costs at least $10 and over two hours of time.
About the same for me but it's a 90 mile roundtrip, on a heavily patrolled parkway with top speed of 50.
I think your original question had to do with the economics of home delivery. When one delivery truck comes out our way, it is likely stopping at dozens of houses along the way, keeping that many people from each making individual trips...and sometimes having to make second trips because the store did not have an item they needed. That part sounds pretty efficient.
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Reminds me of the real old way, where vendors with carts pulled by horses would make their way through the countryside, selling essentials.
I grew up ordering a lot of stuff mail-order. By the time I was about 8 we would put in orders for fishing supplies in early March so we would get out gear for opening of trout season in Vermont.
Now I can pop online and see where the UPS truck is in relation to my house so I can usually track them within 5 minutes of arrival and decide to meet them out in front of the house. Or if it's something heavy or bulky that goes to the workshops (which are 100 yards away), like pallet forks or chain, I can walk down the drive, flag the truck down and they deliver directly to the workshop.
Online I can usually beat the price of in-store except for things sold at Walmart, where we let our orders build up to $35 free shipping.