Upgrades are still a good option but I didn't discuss them in the article because they aren't supported on the App Store.
One caveat with upgrades is it's difficult to maintain many version of the same app. Now with frequent hardware and OS upgrades (yearly!) it's even more expensive than ever to maintain many versions.
One caveat with upgrades is it's difficult to maintain many version of the same app. Now with frequent hardware and OS upgrades (yearly!) it's even more expensive than ever to maintain many versions.