While I preset my touch AF on something well lit 6-10' away before launch, it is not intended as an infinity focus. It is intended as a
hyperfocal distance that includes infinity. Subtle difference, but important. Once set, I switch the touch function in GO 4 (ver. 4.0.0) over to exposure, so as not to
accidentally reset my focus, while turning off the
still incessant High Wind Warnings, by touching them on the screen in the upper left. I have no need to reset the focus for the duration of the 23 minute flight video, even if I land in complete darkness. Personally, I would prefer the same fixed focus of the P4 and the Mavic on the
P4P. On night flights, I use a flashlight on the focus point to set the initial focus within that 6-10' distance. So far, it's worked well for me.