Whenever my upgrade window comes around, I ponder getting a folding phone. But two things stop me.

Firstly, they all run Android, and having been on iOS since 2009 I have very little ambition to switch.

Secondly, as it stands, it's a point of failure that will massively impact its resale value when I upgrade. It's bad enough trying to sell a phone with a two or three year old battery, but batteries can (in general) be replaced. Now imagine trying to sell a phone that has three years worth of screen wear on it, knowing that it could fracture at any moment.

So in the end, cool as they are, they're also pretty handy to the manufacturers as offering a point of failure that'll make them unsellable.