https://www.cnet.com/news/galaxy-fold-teardown-may-reveal-fatal-flaws-in-samsung-foldable-phone/

"The phone ships un-folded—but fold it even once, and that crease becomes pretty easy to spot if you're looking," the teardown noted.

Additionally, the lack of hinge ingress protection leaves large gaps around the phone's spine. This leaves the device's internals vulnerable to dirt, according to iFixit. These gaps are visible when the device is closed, even though the screen is protected.