I started writing Swift within minutes of it being announced. I released my first Swift app on the store just about fifteen minutes after the RC of Xcode was released.

I did a lot of ObjC, but I've enjoyed using Swift. When I create frameworks and modules, they are Swift-only (no ObjC headers), because I like to leverage native Swift stuff, like enums and whatnot.

But I am writing app code. I think ObjC is a better systems language, so I don't think it's going anywhere, any time soon. It's a lot safer than "raw" C.