If they made the screen as easy to replace as possible, treat them as consumable like removable battery, and sell the replacement at reasonable cost, it might actually works. Swapping a foldable screen once a year at $50 on a >$1000 phone is reasonable expense IMO.
those screens are the most expensive part, on top of that replacing them is hard due to technology that makes them good(good enough?), you make them easily replaceable and it will make them less desirable by the customer.
It is the most expensive part, yes, but even so, the BoM price for that flexible screen might still be cheap enough to be passed on to customer. They'll need to be creative on how to make that part as easy to replace as possible with as few material and complexity as possible, maybe like applying a piece of screen protector and slotting the edge into a slot like those thin flex wires.
