I think it's not about the programmers but about the code. Swift code is much less portable than ObjC one. On the other hand, I've never heard of anyone using

I think it's not about the programmers but about the code. Swift code is much less portable than ObjC one. On the other hand, I've never heard of anyone using their ObjC code from iOS app for Android one (by transpiling to Java or building ObjC code as a native library) or vice versa, so I guess this point is probably mostly moot. Except for the rant comes from a GNUstep developer, where ObjC is a language of choice, too (and Swift is supposedly unavailable, at least it's the case at the moment).