Can't tell if you're trolling at this point or if we're both misunderstanding each other. http://store.apple.com/us, the iTunes store and the App Store all rely heavily on sidebar navigation. Vertical content containers save space in addition to giving the user an area of the page that is generally relevant to what they're on the site for (shopping carts, advanced search, related content/archives, account information) without needlessly cluttering the more important horizontal space.
Neither. It's just that different things needs different design approaches. An online store has nothing in common with a presentation site. Just like a real store needs shelves, an online store needs to group the information somehow. Sidebars aren't the only way to group information. I bet Apple will redesign its online store in the near future.
