Office-mate has had an Android foldable. He says beyond longevity, the square display form-factor when it was unfolded just wasn't that useful for anything, 'cause images and video don't have that aspect ratio, and the folding made it bad for reading.
So... a 1.4 aspect ratio: watch old TV shows with a very narrow sidebar, or modern 16:9 with one hell of a status bar on the bottom.
Yeah, not doing anything for me, given the fragility of the fold and the necessary lack of depth for the camera lens.