Cool. I want one like that, just without the inner screen.
My Fold 4 at some point started making grinding noises that raise ones blood pressure. I guess it is now solved as the new hinges are waterproof and stuff.
The screen does not really fold completely does it? All hinge mechanisms have a way to allow the screen to have a smooth arc on the fold point, not rubbing on itself. I've not used a foldable since that model so these are second hand info.
I had a Pixel 9 Pro Fold, and within half a year it developed some issue probably related to the sensor that tells it which screen should be turned on, and the screen would randomly stay black.
At least Google replaced it with the newer generation model for free, which I then sold.