Which folding phones have you owned? I've owned the Z Fold 3, 4, 5, 6, the Z Flip 4, the Pixel Fold, and the OnePlus Open...with my Pixel 9 Pro Fold and Honor Magic V3 Global arriving tomorrow. I've never had an issue with the inner or outer display on any of the foldables I've owned and I don't even put a case on them. Also, the crease is as close to invisible on phones like the OnePlus Open and Honor Magic V3 as physics will allow at this point. It's really not a crease on these phones, because if you took the display off there would be no bend in the display. There is a very slight valley, I guess I would call it, running up the middle of the display where there is no hardware behind it like there is under the rest of the inner display. There is nothing anyone can do about that at this time. Someday, maybe, but I'm not sure how they can get hardware behind the screen in the middle and still allow it to fold without damage. You'd have to implement a tiny piston system that could push a plate or some other piece of hardware up to prevent the valley. The squeeze wouldn't be worth the juice here in my opinion, because I never notice this valley on my OnePlus Open.