Learning curve for Z7/Z6

>Thanks to everyone for all of the excellent suggestions on Z
>system set-ups, they have been very helpful! As I expected, I
>have lots of questions as I set-up my Z6 but will try to sort
>them out before showing the extent of my ignorance.
>
>One question I do have is why the Exposure Delay Mode is being
>assigned to a programmable button when slow shutter speeds
>seem well suited for the electronic shutter? I am assuming
>that its primary use is related to shutter shock rather than
>tripod/handling related vibrations which would be better
>handled with a remote release. Just trying to figure out what
>I'm missing, such as, is there a good reason for staying with
>the mechanical shutter at slower shutter speeds?

Exposure Delay is useful when you do not want to use a remote release. There is no observable shutter shock when using EFCS or electronic shutter.