@neoflyer i have the built in screen RC s for both my
Mini 3 pro and
Air 3 ,and they do offer some advantages over having to use a seperate screen device
those are mainly ease of use, reasonable sized screen ,not affected by heat or cold causing dimming or shutting down
yes the screen brightness could be better in very bright sunlight ,but to aid with this i have covers that fit onto the RC ,that act as protection for leaving the sticks attached and also fold up to act as a sun shield as well
it is also advisable to have a lanyard attached to prevent it falling, if you have to let go of it for any reason ,and it saves the possibilty of the screen being damaged ,during such an event