That’s kind of a weird take. It’s perfectly reasonable that Apple has not attempted to yank all the “NS” references out, but they are absolutely a holdover from NeXTSTEP. That NeXTSTEP no longer exists does not change that.
The convention is a holdover. It does not mean that the code is the same. There’s plenty of NS classes that did not exist before OS X.
The convention is a holdover. It does not mean that the code is the same. There’s plenty of NS classes that did not exist before OS X.