Actually they’ve pretty much nailed the durability under bending and bending only. They used a machine to test that and found the display and hinge can take the stress of folding just fine for a certain threshold number (don’t recall it off the top of my head) that most customers aren’t likely to cross. And if they do cross that threshold, no worries, they will get a replacement. The warranty on this device is not the standard restrictive warranty we are used to seeing.
What Samsung either failed to do, or did but scared testers out of giving honest feedback, was test the Folds in real life conditions long enough to get an accurate picture of additional potential failure and stress points apart from the simple stress of folding the display. So they missed how debris ingress could destroy the display quickly.
As much as I was rooting for this device to succeed, I won’t be an apologist for it. I am appalled at how cheap and flimsy and last-minute the display protector that reviewers accidentally removed appears to be. It looks like a joke. The fact it is so easily removed or becomes delaminated from the display is shockingly poor design.
At any rate, I’m not here to be an apologist but I just wanted to refine that point about the display a bit further. Lol, so, if they can manage to pocket-lint proof it, it should last long enough for people to use it normally. But it will still likely require some warranty service, which Samsung has anticipated and is willing to offer.