Macworld With Apple’s famous walled garden continuing to crumble, the company has made yet another concession to app developers. But it turns out that not everyone will benefit. For more than 15 years, Apple insisted that apps could only be downloaded to the iPhone (and later iPad) from its own App Store, claiming this was necessary to ensure customers didn’t accidentally install malware and scam software. (In practice, you could jailbreak an iPhone or iPad and download apps from other places, but the average user wouldn’t be willing to do this.) That, however, is changing, at least in Europe,…