That’s a real stretch. As someone who previously wrote Obj-C and currently writes Swift full time, whenever I revisit and work on old Obj-C code I constantly have “oh right, Obj-C doesn’t have that” moments and either have to pull in some third-party library that does what I need or settle for a less than satisfactory (and usually dramatically longer) solution.

I do have times when writing Swift where I miss some bit of Obj-C, but those are rare and are becoming fewer as the language develops.