This. After the addition of blocks, Grand Central Dispatch, and the booting of garbage collection in favour of ARC, ObjC is a pleasure to code in and to see it perform. As mentioned, KVC/KVO have made the UI code for my app much simpler than without them.
I'd add that one not be fooled by the apparent verbosity of the "selectors", which is the ObjC equivalent of lisp parens that hits folks new to the language. Their cognitive overhead (for me) is rather low, and they make the code readable without profuse commenting. XCode has been a pleasure as well (despite the occasional crashes), due to the live code correctness feedback (thanks to llvm/clang), auto-complete and auto-correct.
Overall, practically everything's been improving in iOS land as far as I can tell.
I'd add that one not be fooled by the apparent verbosity of the "selectors", which is the ObjC equivalent of lisp parens that hits folks new to the language. Their cognitive overhead (for me) is rather low, and they make the code readable without profuse commenting. XCode has been a pleasure as well (despite the occasional crashes), due to the live code correctness feedback (thanks to llvm/clang), auto-complete and auto-correct.
Overall, practically everything's been improving in iOS land as far as I can tell.