Like many still developing technology modern AF has some applications where it can make a deference in keepers. A fast moving bird in flight captured by predictive follow auto focus for instance. Other fast evolving situations etc. Otherwise, in 35mm SLR's, give me an all matte grid screen and eyepiece correction set for my eyesight. There is a certain delight in focusing a precise, well damped, manual focus lens. And even with manual focus I often go for zone focus with an aperture that allows for enough DOF to cover the scene.