Objective-C is open source, but without Foundation et al it's pretty useless. As tied as Swift is to Cocoa, it's almost certainly going to be in the same boat.

Objective-C is open source, but without Foundation et al it's pretty useless. As tied as Swift is to Cocoa, it's almost certainly going to be in the same boat. Put another way, how well does Objective-C do outside of Apple development?