And AppKit is almost 18 years old; it was started by NeXT and Sun in 1993 or so. UIKit removed a lot of cruft and fixed some pretty big design decisions in AppK

And AppKit is almost 18 years old; it was started by NeXT and Sun in 1993 or so. UIKit removed a lot of cruft and fixed some pretty big design decisions in AppKit. It was a rewrite that was needed, not because an intern had too much time on his hands.