Are you writing Mac or iOS apps? Then, no. You'll pretty much need to learn Swift. Objective-C is clearly in legacy mode. You can't even use several APIs with O

Are you writing Mac or iOS apps? Then, no. You'll pretty much need to learn Swift. Objective-C is clearly in legacy mode. You can't even use several APIs with Obj-C. Are you writing something else? Then, it's probably not the best investment to learn Swift.