[zw]

The Swift standard library is not yet up to snuff for that, you still need to know Cocoa to do basically anything high-level. Thankfully I know Foundation better than I do straight-up POSIX, so that's tenable for me, but it's not for most people who want something script-y.

[tempodox]

Not only that, but you also need to know the hocus pocus to bridge between (Obj)C and Swift. And let's not forget that the Cocoa header files are browsable, thus enabling “discoverability”, while Swift is completely obscure in that respect.