Foldable phones are still struggling in durability tests

Foldable phones still aren't very durable – at least according to some reviewers' experiences with the Motorola Razr and Samsung Galaxy Z Flip. 
In one example, Input's Motorola Razr is practically broken after just a week of use. The phone's screen is peeling away at the hinge, without any real reason besides a temperature change which, frankly, should not harm any phone. 
The Razr fared quite poorly in a durability test performed by Cnet, with its hinge failing after being fold