But I can't really think of anything else that's good for this example. It's not like a huge McDonald's is a good idea. Hardware stores were all independent shops bought up by like Ace and True Value (or closed by Wal-Mart, etc.) so like, nothing really changed (a small hardware store is still a small Ace hardware store). Basically anything else (furniture, carpet) has some floor display models and a catalog you can browse. Which is also what B&N does when they don't have the book you want. Maybe like a Menards or Lowe's? But again they're just like a weird superstore that's part appliance store, part hardware store, part greenhouse and part lumber yard. Feels like we'd actually get broader inventory at individual stores for those things.
* Consistency: you know every store in a chain is going to be within a standard deviation or so of every other
* Economies of scale
* Developing specific supply chains for their business. Sure there's not a specific Applebee's supply chain company, but there are specific product managers at supply chain companies for Applebee's products, and when you take the set of product managers, warehouse space, supply contracts, etc across the whole supply chain industry it results in a specific supply chain for a specific company in a way you can't get if you're a small business
But I also think it's generally bad and weird. Like how many people know that between the major orange juice brands the only difference is the different perfume they use in the concoction? Supply chains are incentivized to deliver huge loads of essentially crap that breaks constantly so demand stays high, or food that's totally loaded with fat/sugar/salt so you eat way more. Plus like, where does that profit go (not the 99% right)?