Most Costco-specific products, sold under their Kirkland brand, are pretty good. They’re always a good value and they’re sometimes are among the best in class separate from cost.

I think Apple’s products improved when they started designing their own silicon chips for phones, then tablets, then laptops and desktops. I have beef with their operating systems but there’s no question that they’re better able to squeeze battery life out of their hardware because of that tight control.

In the restaurant world, there are plenty of examples of a restaurant having a better product because they make something in house: sauces, breads, butchery, pickling, desserts, etc. There are counterexamples, too, but sometimes that kind of vertical integration can result in a better end product.