I think the problem with slide out controllers is the analog sticks, since they’re so tall. PSP and the PSP phone had fairly terrible analog sticks that were flat and low profile, and they SUCKED. They could be recessed in a little well but then they can’t move as far, or have tiny uncomfortable thumb pads. You could make do with only d-pad and a couple face buttons, but at that point you might as well get an 8bitdo keychain controller.
I think the problem with slide out controllers is the analog sticks, since they’re so tall. PSP and the PSP phone had fairly terrible analog sticks that were flat and low profile, and they SUCKED. They could be recessed in a little well but then they can’t move as far, or have tiny uncomfortable thumb pads. You could make do with only d-pad and a couple face buttons, but at that point you might as well get an 8bitdo keychain controller.