My issue with Swift is that it changes faster than I can learn it. I'm not Apple developer, I just write some code for macOS or iOS sometimes, like one time a year. I learned Objective C few years ago and this knowledge is with me. learned Swift 1 but now it's different and it seems that I have to learn it again almost from the scratch.

For professional *OS development Swift probably makes sense. But if I occasionally need to write some code, Objective C for me is preferred. May be Swift is stabilized enough already...