>>3565807Easy, instant prefocus, and only needing to bring the camera to your face for quick correction after composing with imagined frame lines, and actually pressing the shutter button.
The fastest, fanciest autofocus is still slower than just manually focusing where you think your main subject will be in a scene you think might happen, but hasn't yet.
Tracking a subject with an AF camera is conspicuous, and the potential moment you predicted can fall apart if the subject(s) notice.
If you're used to outsourcing most of your picture-thinking to the computer in the camera, you won't appreciate a machine that only does what you tell it to, when you want it to. If you don't understand it, you probably haven't needed it.
