Samsung has a Galaxy fold which I’m interested in buying as a second device. I’d imagine Apple has to have something similar as a prototype as it seems like a no brainer
Problem with current folds is that I want the screen to open/extend. I don't want to open YET ANOTHER LARGER screen. This makes most sense tbf. You want a phone to extend into a tablet, and actually have the first screen still be usable. It cuts down cost and waste of always having at least one screen always off.
Original Huawei mate x and the new trifold does what I'd like. But then again... Huawei so can't in US lol.