I like focusing manually time to time, especially if a lens is designed for that purpose. You learn to depend on your skills and anticipation except of trusting camera's AF system which will fail every now and then.
However, just like the Zeiss' Loxia series, it is an absolutely dumb decision to give them a completely mechanical aperture which only works at shooting aperture, all the time. Just put a tiny motor, magnet, actuator or whatever inside the lens to have it close down to the shooting aperture only at the time of the bloody shooting. Even completely mechanical cameras from 50s got this right but we can't have it on a camera designed in this decade? And the reason people in the 40s and 50s tried to solve mechanical puzzles to design a system which behaves like that is because it makes damn sense. Not in 2017, apparently. Why? Because it's cool to have a completely mechanical lens that will last forever? The Sony FE lens mount probably won't live that long so why bother?
However, just like the Zeiss' Loxia series, it is an absolutely dumb decision to give them a completely mechanical aperture which only works at shooting aperture, all the time. Just put a tiny motor, magnet, actuator or whatever inside the lens to have it close down to the shooting aperture only at the time of the bloody shooting. Even completely mechanical cameras from 50s got this right but we can't have it on a camera designed in this decade? And the reason people in the 40s and 50s tried to solve mechanical puzzles to design a system which behaves like that is because it makes damn sense. Not in 2017, apparently. Why? Because it's cool to have a completely mechanical lens that will last forever? The Sony FE lens mount probably won't live that long so why bother?