Outdated "Gear?" It's a $25,000 bike--
That doesn't change the fact that the music system is outdated.
First you say I should pay more...
Nope, I was just responding to the comments that AAC files could only be played on iPods.
Regardless, Apple still uses a standard for ebooks, the drm is likely an agreement made with the publishing industry that Apple could not negotiate out, after all Steve Jobs never was a fan of DRM.
Even if the format itself is technically a "standard", what possible advantage could that be when those files can't be read on any other device? While the Kindle files can be read on most devices, and the kindle app can read epub documents (and other formats) as well.
Go to the App Store and download an epub reader for the Mac.
So I can get an error message when I try to open a book bought from Apple? Have you actually tried it? The book files apple sells can only be read on iOS devices, nothing else.
So Amazon is trapping you in their proprietary format, while ePub is a standard.
Trapping? Amazon's books can be read on mac, pc, ios, android, even blackberry and windows phone (edit - forgot they also include the ability to read from a web browser, so that should include many other devices as well). Apple's books can be read on iOS, nothing more, not even a mac. Quit fetishizing the file format and look at the options for real world use.
Download an ePub book, rename from .epub to .zip, unzip it, and all the files are there in xhtml format.
That's only the case for files with no DRM. And with epub files without DRM, while the Kindle doesn't read them directly, there are plenty of apps that convert epub to a file the kindle can read.
I actually own quite a few ePub books, bought through iTunes, from a publisher that tries to publish everything DRM free.
That's nice, and it would be great if Amazon allowed authors to release without DRM if they wanted to. But those are the exception from Apple, the vast majority can only be read on iOS.