Why No NSAttributedString on the iPhone?

Question

Does anyone know what made Apple leave out NSAttributedString when turning AppKit into UIKit?

The reason I ask is that I would really like to use it in my iPhone app

Answer 1

The answer above indicates that NSAttributedString is available on OS 4.0 and above, but per the documentation it's available on 3.2:

NSAttributedString Class Reference
Inherits from NSObject
Conforms to NSCoding, NSCopying, NSMutableCopying, NSObject (NSObject)
Framework /System/Library/Frameworks/Foundation.framework
Availability Available in iPhone OS 3.2 and later.
Companion guide Attributed String Programming Guide
Declared in NSAttributedString.h