I sort of agree in terms of the type that unfolds into a larger display, although price is definitely a big factor with those. I feel like durability is becoming less of a concern as more people are exposed to them in the real world. However, I disagree if you’re referring to the type that folds down into a smaller form factor. They have been selling quite well as I understand, and are a clear solution to one of the problems with phones being so large now (that they are no longer pocketable in many cases). I would have a hard time going back to a regular phone after using one of these for over a year now.