Swift, as promised in the last WWDC to much applause and cheering, is now Open 
Source.  swift.org

The potentially interesting point as far as accessibility is concerned is that 
the Swift foundation classes were re-implemented in a portable manner, without 
the use of the Objective-C runtime.  That means we won’t be learning the 
mechanics of the runtime from the Swift code.  The Objective-C runtime is, 
itself, open-source, but is of no use outside OS X and iOS.  That would seem to 
mean that there will probably continue to be less interest in targeting the 
objective-C runtime and therefore accessibility protocols of iOS and OS X from 
outside of Cocoa and therefore iOS and OS X development.  This is a shame, but 
I suppose the broader portability is an overall plus.  Of course, each platform 
already provides its own accessibility APIs at the higher levels anyway, so 
this is purely academic and speculative, but when we were discussing this 
before, Swift was brought up as a possible growth point.  It doesn’t look like 
it will be now.

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