Samsung has announced the Galaxy Z TriFold, a foldable phone comprised of three ultra-thin (~4mm) panels and two sets of hinges, that unfolds into a 10-inch tablet. When closed, it resembles a standard smartphone with a 6.5-inch display that is 12.9mm thick. Because the main screen is so large, Samsung has created a "standalone" version of Samsung DeX, meaning it can switch to a PC-like desktop mode without attaching ...
Because they’re fragile. You don’t want your screen to die on the first drop.
and you don’t want it full of scratches, since cover glasses and protection cases will probably be quite complicated for these monstrosities?