They’re way too expensive. Moving parts such as the folding screen are just a focal point for stress, which is unacceptable given how expensive they are. I hate hearing that people can get dust in the hinge without anyway to clean it out.

You’re also paying for extra screens such as the one on the outside and the folding inner screen. This is just added unnecessary cost when you’ll never use both at the same time. I’m guessing the outer screens were added to reduce the number of times people unfold the phone over its lifetime, which gets back to my other point that adding moving parts just adds more issues than it solves.

Overall, I see it as a novelty at best. From the prices I’ve seen them sold at for the phones that turn into a tablet like device when unfolded, you can just buy a phone and a tablet separately for less. I think their purpose is to create a product more expensive than what the current flagship phones run, giving rich people something to spend additional money on to to show they have a lot of money and enough novelty for tech reviewers to discuss during reviews.